Movm.: bridge movement, frosted gilt, polished screws, blue sapphire jewels, wolfs teeth winding wheels, bimetallic gold and platinum screw chronometer balance with 2 regulation weights, blued helical free sprung balance spring with terminal inner curve
Only 500 of this famous „Blue Sapphire“ were created. This is the only American freesprung caliber except for „Elgin father time“. This is one of the highest quality pocket watches ever produced in the US!