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Signature	Maker	Instruments	Comments	Location	References
PFEIFFER, JOHANNES ANDREAS	Germany, fl.1717-47, MIM	Universal Ring Sundial = OXF; Combination Drawing Compass No. 4, 1742 = Koller, 1972 = P.C. = Christie 4/3/85; Graphometer, 1747 = Huelsmann Coll.		Coburg.	Evans 1; Gunther 2; Michel 3; Syndram; RSW.
PFEIFFER, JOHANNES ANDREAS	Germany, fl.1717-47, MIM	Universal Ring Sundial = OXF; Combination Drawing Compass No. 4, 1742 = Koller, 1972 = P.C. = Christie 4/3/85; Graphometer, 1747 = Huelsmann Coll.		Coburg.	Evans 1; Gunther 2; Michel 3; Syndram; RSW.

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