Germany: Mecklenburg-Vorpommern, Brunn / 1987
Intertech Bow Compass Sold by Hearlihy & Co.
Intertech Bow Compass Sold by Hearlihy & Co.
The Smithsonian catalogs Intertech Bow Compass Sold by Hearlihy & Co. as bow compass in its Mathematics records.
WHY IT’S INTERESTING
This blue zinc alloy instrument has a black plastic handle. Black plastic adjusting bolts set the width of the instrument and the length of the needle and pencil points. The front of the handle is marked with the letter H. The bolt on the silver metal bow screw is marked: MADE IN W. GERMANY – PATENT. A fitted clear and black plastic box has a black and white plastic tube with two replacement penci