{
    "schema_version": "1.0",
    "source": "Universal Philatelic Auctions Catalogue",
    "record": {
        "catalogue": "UPA103",
        "auction_id": 103,
        "lot_number": 10189,
        "country_area": "Great Britain - KGV",
        "subheading": "",
        "date": "1929",
        "sg_reference": "438",
        "description": "Ninth UPU Congress London: P.U.C. £1. Black, genuine sound no faults commercially used example well-cancelled clear of profile by almost legible date contemporary Registered oval date stamp cancel. Well-centred fractionally S., perforation clear of design. Reverse small hinge remnants. Very Good Used-Fine example. One of the finest engraved stamps in existence. Almost every collector's favourite. (1v.)",
        "classification": "U",
        "size": "Small",
        "plate": "31",
        "sg_catalogue_value_gbp": 600,
        "upa_estimate_gbp": 375,
        "image_url": "https://www.upastampauctions.co.uk/contents/en-uk/upa103/10189.jpg",
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        "json_url": "https://catalogue.upastampauctions.co.uk/lot/103/10189.json",
        "current_catalogue": true,
        "last_updated": "2026-10-02T15:47:51+00:00",
        "transaction": {
            "label": "View / bid",
            "url": "https://www.upastampauctions.co.uk/contents/en-uk/UPA103-AllLots.html"
        }
    }
}