1870 Elgin Grade 57 H.Z. Culver pocket watch untested1870 Elgin Grade 57 H. Z. Culver pocket watch untested Based on the serial number 68578, your watch movement is an ultra early 1870 Elgin National Watch Co. (Grade 57 H. Z. Culver) mechanical pocket watch. This serial number places it even earlier than the previous one, coming from one of the earliest production years in the history of the Elgin National Watch Company. It features Elgin's foundational mechanical architecture. Technical Specifications