Size: 17 - Jewels: 23RSJ - Model: 13 - Grade: SANGAMO SPECIAL - Year: 1925 - # Made: 9,810 - # of runs: 11, Between 1923 and 1926.
Movement Lettering: SANGAMO SPECIAL - 23 JEWELS - MOTOR BARREL - ADJUSTED TEMP. AND SIX POSITIONS - ILLINOIS WATCH CO. - SPRINGFIELD - D.R.
Movement Description: "Sangamo Special" - Temperature, six positions, isochronism - Ruby and saphire jewels in raised gold settings, gold balance screws and rounded & polished gold train wheels - Unmarked 60 hour mainspring - Patent regulator - Cased at the factory.
Movement Finish: Broad transverse band pattern, damaskeened nickel with red-filled engraving.
Dial: 17-size sunk seconds or double-sunk glass enamel bold Arabic or modern Gothic regular or Montgomery dial, or non-tarnishable silvered metal dial.
This one is indeed a metal dial.
Phil Dellinger NAWCC# 157070 IHC Life Member (L12)
Here is a pretty neat copper printers block that I recently got from auction at eBay. This block depicts a Sangamo Special watch, and shows how advertising was done in the "Olden Days".
This picture is the way the block print looks when you are looking straight into it. Everything is backwards!