The lot is the unit everything else at an auction is built on. Each lot has a number, a title and description, photographs, an estimate, often a reserve, and a consignor who owns it until the hammer falls. Bids are placed on lots, the hammer price is recorded per lot, invoices list lots, and consignor statements settle lots. When auction house staff say “a 600-lot sale” they are describing the size of the catalog and the length of the day.
Lotting
Deciding what goes into each lot is called lotting, and it is a commercial judgement as much as a cataloging one. A rare coin is a lot on its own because it will attract bids on its own. Twenty common coins of the same type are one lot because nobody would bid on them separately and the cataloging cost would exceed the hammer. Between the two sits most of the decision-making in a specialist sale: whether to split a collection into lots that collectors will fight over or keep it together for a dealer who wants the whole thing. A good rule is to lot for the bidder you expect to win, not for the consignor’s sense of how the items belong together.
Lot numbers and running order
Lot numbers fix the running order and should not change once the catalog is published, because bidders have already written them down and left absentee bids against them. Lots withdrawn before the sale keep their number and are announced as withdrawn. Lots added late take a suffix, such as 212A. In a timed sale the lot number also sets the closing sequence under staggered closing.
The lot record in auction software
In a modern platform the lot is a single record that follows the item from consignment intake to settlement: the consignor and contract terms, the catalog text and photos, the estimate and reserve, every bid including the underbidder, the hammer price and buyer’s premium, the invoice, shipping and the consignor statement. Circuit’s AI cataloging drafts the description and estimate from the photographs at the point the lot record is created, so the specialist edits rather than types, and the auction house CRM records every bidder who touched the lot for the next sale.
