This is a American Clipper with a black gilt dial and plain un-engraved case. . It is shown as a variant "C" in the ads but that one has a bracelet. The case is 10KT yellow rolled gold plate. The movement is 17J 10E with dual date codes of a crescent and shield. A very nice black dial with gilt hour markers at the evens and sticks at the odd numbers.
Movement Date Code
Case Serial No.