Keefer, BB flat helicon, 3 piston, c.1918


Tag #: 09931
Serial #: 6344/6855

Bell Diameter Bore Size
28″ .685″ est.


“BRUA C. KEEFER MFG. CO. / MAKER / WILLIAMSPORT PA. / HIGHEST GRADE / 6844” on bell. Floral engraving around identification marks. “6855” on 2nd valve. “Keefer” on opposite side of 2nd valve.

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