Look at this rare 16s Hamilton Model 991 Railroad 21 Jewels Highly damascened Nickel Hunter Pocket Watch Movement. This movement measured 43.2 mm in diameter and it's in excellent running condition. Single sunken porcelain dial with black Arabic numeral hour markers in good condition, no edge chips but there're couple faint hair lines outside at 22-minute track 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.