23 extra quality ruby and sapphire jewels adjusted to six positions, manufactured in 1917 a total of 100 movements in 1 run make up this grade. Model 3
open faced; bridge movements of highest quality, double roller, Illinois superior motor and patent micrometric regulator.
The movements have crosshatch pattern demaskeening named Illinois Watch Co. These watches are similar to grade 410, model 3 the only difference
is that the adjustments are marked as letters "Adjusted Six Positions". Jeweled Barrel is marked on the pillar plate. No Illinois advertising for these watches
has been found and looked to be sold as movements only.
23 extra quality ruby and sapphire jewels; gold settings; adjusted to temperature, six positions and isochronism; spring tempered compensating balance,
gold screws including timing screws; steel escape wheel; double roller; gold train wheels; Breguet hairspring; patent regulator; safety center pinion; safety
recoil click; Illinois superior motor barrel; double sunk dial; is accurately constructed and highly finished in every detail.
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