Bulova Bulova 6BK

The Bulova 6BK is a manual-winding mechanical movement manufactured by Bulova from 1947 to 1950. It is based on the Aurore-Villeret 120 caliber and shares identical specifications with the Bulova 6AH and FHF 120, with design evidence pointing to Aurore-Villeret as the original source. The movement was produced during a period when American watchmakers frequently adapted Swiss ebauches for their own lines. It was discontinued in 1950 as Bulova shifted toward newer movement designs.