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Aurora Ball Columbus Elgin Hamilton Hampden E. Howard Watch Co. (Keystone) E. Howard & Co. Illinois Lancaster Manistee Marion U.S. Watch Co. New York Standard Rockford Seth Thomas South Bend Tremont & Melrose Waltham

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Illinois Grade 528 Variants

Profile Code	Size	Jewels	Configuration	Finish	Model	Setting	Estimated Production
12s-M2XT-21j-ONP-A5P-	12s	21j	Openface	Nickel	2XT	Pendant	1,200

Estimated Timeline for Variants

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