Look at this beauty 10s Hamilton 17 Jewels Model 917 High Grade Open Face Pocket Watch Movement. This movement measured 38.1 mm in diameter without dial and stem, and it's in excellent running condition. Single sunken painted dial with golden Arabic numeral hour markers, with a bit patina look as you can see at photos. If you have any questions, please no hesitate to ask and I'll do my best to answer your needs. Good luck, stay safe and thank you so much for looking.