When the "Crescent Street" movement first debuted, it included several new features designed to quickly capture the growing railroad market. These features were detailed in advertisements published by Robbins & Appleton, general sales agents for the American Watch Company. Earliest Crescent Street Advertisement (Robbins &...
Mainspring
Merritt Burt's Patent Safety Pinion (Center Wheel and Pinion from National Watch Company Movement) On September 13, 1864, Merritt Burt was granted the first patent for a safety pinion design.
National Watch Company (Elgin) B.W. Raymond #829 Marked "Burt's Patent" "Mainspring Events" The large mainspring that serves as the power source for a mechanical watch movement can also become a.