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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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Rockford Grade 537 Parts

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	Part	Factory Part Number
	Balance Staff	739	Roller: Single
	Balance Staff	729	Roller: Double

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