Elgin Grade 180

Here is a nice Elgin grade 180. This is an 18 size movement, lever-set, 17 jewels, made about 1909.

Lately I have been taking note of the secondary serial number marks, stamped on a few of the watch parts, in places where they don't show, on antique American watches. Frequently, these numbers are prefixed with a symbol that stands in for the first few digits of the movement number.

The secondary serial number stamps on this Elgin watch are prefixed with a '5' having 3 bars above it. The serial number of the movement is "13586621", beginning with "135", the the 5 and 3 bars makes sense.