British Vickers Headspace Washer Set: No. 2 UZI The cup is engraved on

The cup is engraved on the exterior:

being the experts they are

Bearing German makers names and 1928 dates

Original Item:   The standard signal pistol in the German Army up until 1942 was based on a design introduced in 1928

located on the frame

British Vickers Headspace Washer Set: No. 2 UZI The cup is engraved onOriginal Item: Headspace in the Vickers medium machine gun is adjusted by adding or removing thin washers from the connecting rod. See Ian Skennerton, S. A. I. S. No. 8, . 303 Vickers Medium Machine Gun, Plate G, items 15 ? 18. IMA has a few of the No. 1 (0. 003 inch) and No. 2 (0. 005 inch). British nomenclature is WASHER, ADJUSTING, NO. 1, . 003 IN and WASHER, ADJUSTING, NO. 2, . 005 IN. These are very rare, and IMA has only a very few. They are