Each item/lot has an item number that uniquely identifies it. Two different lots will never have the same item number.

The item number is amongst others shown on the item's label, in case you are visiting one of our auction houses. You can enter an item number into the search box to jump directly to that item.

Items sold at hammer auctions also have a catalog number. The first lot of a hammer auction always has the catalog number 1, the next has catalog number 2 etc.

Two items in two different hammer auctions can have the same catalog number, but never the same item number.

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