Its a 15 jewel movement, 18SZ Runs good. It was just serviced, cleaned and oiled, keeps good time. The #s on the movement are, 13610570 made in 1904. This is a big watch, it measures from side to side 61.25 mm. The dial is clean with a couple of light hairlines, you can see in the pictures. The glass has a few scratches. Winds and sets smooth. The case looks good, has a few small dents and dings, which is normal for its age. Its a stem set and stem wind.