Extremely rare, even in their country of origin, these two models of Boley forming machine were listed in a 1912 Hahn & Kolb catalogue. They were intended for use in the watchmaking industry and used sheet-metal forms as templates to create small and highly accurate dies and tooling for use in production processes. As can be seen, they used elements of a WW-pattern watchmakers' lathe mounted on a swivelling bracket with the height-and-lengthways adjustable cutting head driven from a flat-belt pulley through an universally-jointed shaft.
Two versions were made, each in four sizes: the upper of the two illustrated below was made as the No. 1501 and 1502 whilst the lower, with its inclinable centres, as the 1503 and 1504.