This is a Large 18SZ, Heavy Gold Filled Case, its an Elgin Pocket Watch. Its a 7 jewel movement, 18SZ Runs good. It was just serviced, cleaned and oiled, keeps good time. The #s on the movement are, 3550184 made in 1889. This is a big watch, it measures from side to side 55.25 mm. The dial is clean with a couple of light hairlines, you can see in the pictures. The glass is new. 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.