# sgbaldwins — Stanley Gibbons Baldwin's hammer prices

London auction house for stamps (Stanley Gibbons), coins and medals (Baldwin's). Past auctions since 2020.

• Engine: api — Next.js page-data JSON (/_next/data/<buildId>/…), buildId read from the home page __NEXT_DATA__.
• Flow: auctions/past-auctions.json (departments Stamps / Coins / Medals & Militaria) → auctions/<slug>.json (all lots of the sale) → raw records of 200 lots.
• Records: sale per sold lot — hammer_price GBP (buyerPremiumIncluded=false), financeItem.premium and the 23 % tier kept in metadata with the total, estimate low/high, sale date = lot session_date, identifiers.sgbaldwins_lot (+ sg_number for stamps), grade parsed from titles (PCGS/NGC…).
• Cursor: { doneAuctions, done }.
• Config: auctionsPerRun, departments.
• Smoke: pnpm tsx connectors/api/sgbaldwins/_smoke.ts 1