Lot 220
220
An American marching compass signed MarkVII MOD.D SPERRY GYROSCOPE Co BROOKLYN N.Y.No.6027; a French pocket compass; a pocket compass/sundial and a simple drum microscope

Details
An American marching compass signed MarkVII MOD.D SPERRY GYROSCOPE Co BROOKLYN N.Y.No.6027; a French pocket compass; a pocket compass/sundial and a simple drum microscope

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