Vintage Coach Hunter

{
    "is_handbag_probability": 0.02,
    "coach_probability": 0.015,
    "vintage_probability": 0.03,
    "authenticity_confidence": 0.015,
    "image_quality_score": 0.855,
    "seller_misidentification_probability": 0.025,
    "confidence": 0.93,
    "recommended_max_bid": 4,
    "estimated_resale_low": 5,
    "estimated_resale_high": 15,
    "possible_models": [],
    "positive_evidence": [],
    "negative_evidence": [
        "photo 1: item is a loose metal curb-chain replacement strap, not a handbag.",
        "photo 2: strap is shown separately with lobster\/swivel clasps and no bag attached.",
        "photo 4: close-up shows generic gold-tone chain construction with visible tarnishing, not a Coach identifier.",
        "photo 5: clasp and chain have no legible COACH wordmark, horse-and-carriage mark, creed, or style number.",
        "seller states the item is an unbranded 48-inch replacement strap; this is consistent with the photos.",
        "photo 1-6: object is a metal curb-chain purse strap only, not a handbag",
        "photo 1-6: no leather bag body, no flap, no turnlock, no creed patch, no hangtag visible",
        "photo 4-6: bright gold-tone plated curb links with modern lobster-clasp swivel hooks, not vintage Coach solid brass leather-strap construction",
        "photo 2-3: seller-stated 48in metal replacement strap with tarnishing, inconsistent with 1970s-1990s Coach glove-tanned leather straps"
    ],
    "missing_information": [
        "No handbag is included or shown.",
        "No Coach creed patch, serial\/style number, hangtag, or attached bag is available to inspect.",
        "No handbag present in any photo - only a replacement chain strap",
        "No creed, serial, wordmark, leather, lining or bag construction to assess",
        "No Coach identifiers visible to decode or date"
    ],
    "authenticity_concerns": [
        "The photographed item is an unbranded accessory rather than a Coach handbag; Coach manufacture cannot be supported from the visible features.",
        "Generic gold-tone plated chain and tarnishing are not characteristic evidence of a vintage Coach bag."
    ],
    "possible_model_reasoning": [
        "No Coach handbag model is applicable because the listing contains only a loose replacement strap.",
        "The Y2K description and generic metal-chain construction suggest a modern accessory, but the date cannot be independently established from photos.",
        "Condition: Good; visible tarnishing and finish wear are present in photos 1, 4, and 5.",
        "No handbag present so no Coach model match possible",
        "Chain-only accessory with modern plated hardware and lobster clasps does not correspond to any vintage Coach catalog style which used leather straps with brass dogleash\/lobster clips or buckles",
        "Condition: Good with tarnish noted by seller (photos 2-4 show dull\/darkened tone); not gradable on Coach six-tier bag scale"
    ],
    "estimated_era": "modern (2000s+), non-Coach",
    "observed_features": {
        "creed_present": false,
        "serial_or_style_number_present": false,
        "coach_wordmark_present": false,
        "turnlock_present": false,
        "hangtag_present": false,
        "creed_text": "not_visible",
        "serial_or_style_number": "not_visible",
        "hardware_description": "photo 1: gold-tone curb chain with multiple lobster\/swivel clasp attachments; photo 4: links and clasps show surface tarnishing and wear.",
        "leather_description": "not_visible",
        "lining_description": "not_visible",
        "strap_construction": "photo 1: approximately 48-inch metal curb-chain replacement strap; photo 2: doubled\/folded chain with clasp ends.",
        "stitching_description": "not_visible"
    },
    "ensemble_agreement": "HIGH",
    "ensemble_variance": 0.0006,
    "ensemble_members": [
        {
            "model_name": "openai:gpt-5.6-luna",
            "result": {
                "is_handbag_probability": 0.02,
                "coach_probability": 0.01,
                "vintage_probability": 0.01,
                "authenticity_confidence": 0.01,
                "image_quality_score": 0.91,
                "seller_misidentification_probability": 0.02,
                "estimated_era": "modern (2000s+), non-Coach",
                "possible_models": [],
                "positive_evidence": [],
                "negative_evidence": [
                    "photo 1: item is a loose metal curb-chain replacement strap, not a handbag.",
                    "photo 2: strap is shown separately with lobster\/swivel clasps and no bag attached.",
                    "photo 4: close-up shows generic gold-tone chain construction with visible tarnishing, not a Coach identifier.",
                    "photo 5: clasp and chain have no legible COACH wordmark, horse-and-carriage mark, creed, or style number.",
                    "seller states the item is an unbranded 48-inch replacement strap; this is consistent with the photos."
                ],
                "missing_information": [
                    "No handbag is included or shown.",
                    "No Coach creed patch, serial\/style number, hangtag, or attached bag is available to inspect."
                ],
                "authenticity_concerns": [
                    "The photographed item is an unbranded accessory rather than a Coach handbag; Coach manufacture cannot be supported from the visible features.",
                    "Generic gold-tone plated chain and tarnishing are not characteristic evidence of a vintage Coach bag."
                ],
                "observed_features": {
                    "creed_present": false,
                    "creed_text": "not_visible",
                    "serial_or_style_number_present": false,
                    "serial_or_style_number": "not_visible",
                    "coach_wordmark_present": false,
                    "turnlock_present": false,
                    "hangtag_present": false,
                    "hardware_description": "photo 1: gold-tone curb chain with multiple lobster\/swivel clasp attachments; photo 4: links and clasps show surface tarnishing and wear.",
                    "leather_description": "not_visible",
                    "lining_description": "not_visible",
                    "strap_construction": "photo 1: approximately 48-inch metal curb-chain replacement strap; photo 2: doubled\/folded chain with clasp ends.",
                    "stitching_description": "not_visible"
                },
                "possible_model_reasoning": [
                    "No Coach handbag model is applicable because the listing contains only a loose replacement strap.",
                    "The Y2K description and generic metal-chain construction suggest a modern accessory, but the date cannot be independently established from photos.",
                    "Condition: Good; visible tarnishing and finish wear are present in photos 1, 4, and 5."
                ],
                "confidence": 0.96,
                "recommended_max_bid": 3,
                "estimated_resale_low": 5,
                "estimated_resale_high": 15
            }
        },
        {
            "model_name": "meta:muse-spark-1.3-contributor",
            "result": {
                "authenticity_concerns": [],
                "authenticity_confidence": 0.02,
                "coach_probability": 0.02,
                "confidence": 0.9,
                "estimated_era": "modern (2000s+), non-Coach",
                "estimated_resale_high": 15,
                "estimated_resale_low": 5,
                "image_quality_score": 0.8,
                "is_handbag_probability": 0.02,
                "missing_information": [
                    "No handbag present in any photo - only a replacement chain strap",
                    "No creed, serial, wordmark, leather, lining or bag construction to assess",
                    "No Coach identifiers visible to decode or date"
                ],
                "negative_evidence": [
                    "photo 1-6: object is a metal curb-chain purse strap only, not a handbag",
                    "photo 1-6: no leather bag body, no flap, no turnlock, no creed patch, no hangtag visible",
                    "photo 4-6: bright gold-tone plated curb links with modern lobster-clasp swivel hooks, not vintage Coach solid brass leather-strap construction",
                    "photo 2-3: seller-stated 48in metal replacement strap with tarnishing, inconsistent with 1970s-1990s Coach glove-tanned leather straps"
                ],
                "observed_features": {
                    "coach_wordmark_present": false,
                    "creed_present": false,
                    "creed_text": "not_visible",
                    "hangtag_present": false,
                    "hardware_description": "gold-tone metal curb chain links with round split rings and lobster-clasp swivel hooks at both ends; visible tarnishing\/darkening in photos 2-4",
                    "leather_description": "not_visible",
                    "lining_description": "not_visible",
                    "serial_or_style_number": "not_visible",
                    "serial_or_style_number_present": false,
                    "stitching_description": "not_visible",
                    "strap_construction": "48in metal curb-chain replacement strap alone, no leather, no bag attached",
                    "turnlock_present": false
                },
                "positive_evidence": [],
                "possible_model_reasoning": [
                    "No handbag present so no Coach model match possible",
                    "Chain-only accessory with modern plated hardware and lobster clasps does not correspond to any vintage Coach catalog style which used leather straps with brass dogleash\/lobster clips or buckles",
                    "Condition: Good with tarnish noted by seller (photos 2-4 show dull\/darkened tone); not gradable on Coach six-tier bag scale"
                ],
                "possible_models": [],
                "recommended_max_bid": 5,
                "seller_misidentification_probability": 0.03,
                "vintage_probability": 0.05
            }
        }
    ],
    "_usage": [
        {
            "model_name": "openai:gpt-5.6-luna",
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            "output_tokens": 623,
            "total_tokens": 18425,
            "estimated_cost_usd": 0.008616
        },
        {
            "model_name": "meta:muse-spark-1.3-contributor",
            "input_tokens": 18143,
            "output_tokens": 1102,
            "total_tokens": 19245,
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}