This is an estate found older pocket watch. It is open face, 16 size, stem wind. The yellow gold filled case is plain, and truly excellent. It has no brassing, no dents, and no monograms. The bow is still tight! It is high quality, by the Philadelphia Watch Case Co., 20 Years. It has a lever cutout, so my guess is that this case can be used or adapted to another movement. The watch is not working properly. It runs and sets, but when I engage the chrono it stops. It has not been cleaned or serviced in years, so I am offering it on an as-is basis for parts or restoration. The porcelain dial is excellent, with no hairlines. Nice blued steel hands. If the watch does not sell and you need the movement, let me know and I will keep the case. Buyer pays shipping, $4 in USA. Thank you.