Signedengraved on metal loop: LUFKIN
FunctionFor gripping surveying tape along its lenth in order to exert tension. User first pulls loops apart, inserts the tape between them, then pushes loops back together to clamp down on tape.
Primary Sources"LUFKIN Measuring tapes." Gurley Engineering Instruments (1938): 1015.
ProvenancePrivate Donor, 2003.