Grade 410
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Front, Back, Face, Movement, Front case mark, Back case mark, Cuvette mark, Angle view of movement, 2nd angle view of movement

The Illinois Grade 410 is one of several 12 size grades that were made in a very high quality 23 jewel version.  The watch is similar in many ways to the 12 size 23 jewel Illini. The 410 was made in both hunting case (model 4 and 6) and open face (model 3 and 5).

This example is a Model 4 HC (sn 3538059) that was made in 140 examples.  This is the least common configuration.

Model 3 OF - 740
Model 4 HC - 140
Model 5 OF - 2700
Model 6 HC - 1000 (200 without seconds bit cased as open face)