TitleParagon protractor No. 1225 in case
ManufacturerKeuffel & Esser Co.
Dimensionsoverall: 1 in x 14 1/4 in x 6 1/2 in
DescriptionFrom Gordon Bell's artifact collection webpage: Keuffel & Esser co., 1 "Paragon protractor No. 1225"protractor, Drawing instrument, ca 1920, USA, nickel, mahogany case with velvet, Buy, NE Trade Center."
The semicircular protractor has a horn center and movable arm capable of being set at .5 degrees.