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Temple length rule / side rule
MANUFACTURING AND DISPENSING EQUIPMENT
side rule
Bay State Optical Company
North America: USA
1960s?
card
overall: 88 x 158 mm
2002.673
MANUFACTURING AND DISPENSING EQUIPMENT
side rule
Bay State Optical Company
North America: USA
1960s?
card
overall: 88 x 158 mm
Spectacle side measuring rule. White card. Scale marked in inches on upper side, printed in black with illustration of a drop-end side.
2002.673
Paul Fairbanks Archive