While I am going on about pocket watch Chronographs, I may as well share this one as well.
Made by New York Standard (owned by Keystone), anywhere from 1905 on, in a nice 20 year Keystone J Boss case. New York Standard were very much a low-mid range manufacturer, well below the likes of Elgin, Waltham, etc. It has a giddy 7 jewels - but a nicely finished movement with blued screws and damaskeen/frosted finish. It was not an expensive watch at the time, but rather an interesting piece from a US manufacturer.
I am missing the chrono hand, which is 20mm from pivot - otherwise working fine and pretty much mint. Photos are a bit rubish, I should try harder
Nice thing about this movement is that it tries so hard. The three positions, start, stop and reset are there and the chrono drive is properly engaged and disengaged. The flyback feature even works