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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 820 Variants

Profile Code	Size	Jewels	Configuration	Finish	Model	Setting	Estimated Production
18s-M8-17j-HNL-APTI-	18s	17j	Hunting	Nickel	8	Lever	331

Estimated Timeline for Variants

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