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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 Watch Co. New York Standard Rockford Seth Thomas South Bend Tremont & Melrose Waltham

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Aurora
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Rockford Grade 510 Variants

Profile Code	Size	Jewels	Configuration	Finish	Model	Setting	Estimated Production
16s-M4-21j-HNL-A5PTI-	16s	21j	Hunting	Nickel	4	Lever	500

Estimated Timeline for Variants

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