{
  "schema": "clutch-master-variant-evidence-v1",
  "date": "2026-10-27",
  "scope": "Clutch-master source comparison and repair-identity boundary; no fitted part selection or replacement procedure.",
  "factory": {
    "source": "https://www.spridgets.de/downloads/Parts-1977.pdf#page=154",
    "pdf_page": 154,
    "printed_plate": "107-G5/G6, MG0095A",
    "sha256": "a3181ad2dfa44fe4604549421c90dc675d50d34ae0416421a180cf0c17f198fe",
    "visual_read": "Clutch master cylinder/supply-tank BHA4615 used prior to AAU2298. AAU2298 and AAU3469 pushrod entries show GAN6-167343 on North America and GAN6-169644 on except North America. Separate spring27H7751,retainer27H7554,circlip17H7560 and repair-kit8G8730 roles appear in this mixed-coverage plate. No seal-shape dimensional drawing or cup/ring identification by that chassis split is supplied.",
    "applied": "Record the two market-specific listing changes separately; do not turn them into a fitted seal-kit choice."
  },
  "vendor": {
    "source": "https://www.moss-europe.co.uk/content/files/pdfs/moss-europe-sprite-midget-catalogue-issue-25.pdf#page=197",
    "pdf_page": 197,
    "printed_page": 139,
    "sha256": "13a3ef5c108a955218a02fcfd1c221af62842f1da2ff1dd2944204a46237d9c8",
    "visual_read": "Master Cylinder & Pedal (All models) note describes internal changes around GAN6-169643 and later cylinders supplied as earlier-car service replacements. Own catalogue pairs plain-body/no-circle-or-groove AAU2298/AAU2298OE with GRK3005; circle-or-groove GMC1005/GMC1005Z with GRK3008. This is vendor listing association,not an owner-cylinder diagnosis.",
    "market_boundary": "The1500slave/pipe subsection on the same page explicitly excludes North American coverage. Its pipe/kit applicability is not transferred to this car."
  },
  "current_supplier_crosscheck": {
    "source": "https://rimmerbros.com/Item--i-GMC1005",
    "read": "Own GMC1005 listing includes Midget1500 all models,while earlier1275 applications specify ring-type main seal. This corroborates a service-product association,not fitted identity or a new dimension."
  },
  "factory_overhaul_boundary": {
    "source": "https://www.spridgets.de/downloads/Midget%201500%20WH%20Teil%203.pdf#page=29",
    "printed_page": 133,
    "operation": "33.20.07",
    "visual_read": "SNC045 distinguishes main and secondary cup roles in the depicted overhaul. It is not proof that an unidentified cylinder or later replacement has those illustrated internals. Broad factory dependencies are already recorded in master-connections-study/#factory-clutch-operations; no duplicate removal guide is added."
  },
  "unresolved": [
    "Whether the fitted cylinder has been replaced and which casting/seal architecture it contains.",
    "How the factory listing changes relate to the vendor approximate internal-change note; they are not asserted to be the same change.",
    "Fitted bore,seal dimensions,wear,fluid compatibility,pressure integrity and safe access/disconnection/bleeding procedure."
  ],
  "model_boundary": "The pale/black master-source labels describe photo envelopes. Their rear construction pockets are explicitly not hydraulic bores. Reservoir/cap color,model year,nominal chassis date and generic explode offsets cannot identify a cup/ring repair kit. No geometry,owner record or fitted identity changed."
}