# Universal Philatelic Auctions Catalogue

> Public, machine-readable discovery guide for the UPA online stamp auction catalogue.

The authoritative lot facts come from the same UPA catalogue database used by the human-facing catalogue pages. SG catalogue values and UPA auction estimates are distinct fields and should not be conflated.

## Current catalogue
- Catalogue: UPA103
- Closing date: 2026-10-06
- Current lots: 21466

## Discovery resources
- Catalogue home: https://catalogue.upastampauctions.co.uk/
- XML sitemap index: https://catalogue.upastampauctions.co.uk/upa-catalogue-sitemap.xml
- Paginated JSON catalogue feed: https://catalogue.upastampauctions.co.uk/upa-catalogue-feed.json
- WordPress sitemap: https://catalogue.upastampauctions.co.uk/wp-sitemap.xml

## Individual lot records
Human-readable lot pages follow: https://catalogue.upastampauctions.co.uk/lot/{auction_id}/{lot_number}/
Machine-readable JSON follows: https://catalogue.upastampauctions.co.uk/lot/{auction_id}/{lot_number}.json
Example: https://catalogue.upastampauctions.co.uk/lot/103/238/
Example JSON: https://catalogue.upastampauctions.co.uk/lot/103/238.json

## Field notes
- sg_reference: Stanley Gibbons catalogue reference as supplied in the UPA catalogue.
- sg_catalogue_value_gbp: Stanley Gibbons catalogue value, not the auction estimate or sale price.
- upa_estimate_gbp: UPA auction estimate.
- classification: UPA condition/classification code as recorded in the catalogue.