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Unspecified / mid 20th century

Record Bow Compass

Record Bow Compass

The Smithsonian catalogs Record Bow Compass as compass, drawing in its Mathematics records.

WHY IT’S INTERESTING

The pen and needle points (including its screw) are missing from this steel instrument. Because the pen point may be removed, this instrument is not like other bow pens in the collections. A disc for adjusting the width of the instrument is on a screw between the legs. A cylindrical ridged handle is directly attached to a ring inserted into the legs. The leg that would have the pen attachment is m

SERENDIPITYA little unexpected
FamiliarWeird

A CLOSER LOOK

The Smithsonian lists the object under Mathematics and dates it mid 20th century.

The pen and needle points (including its screw) are missing from this steel instrument. Because the pen point may be removed, this instrument is not like other bow pens in the collections. A disc for adjusting the width of the instrument is on a screw between the legs. A cylindrical ridged handle is directly attached to a ring inserted into the legs. The leg that would have the pen attachment is m

FOLLOW THE EVIDENCE

Smithsonian InstitutionRecord Bow Compass

Original explanation based on the sources above. Images carry their own reuse terms.