C. 1895 Starrett protractor head No. 12 with accessory level MR1281
As shown in the 1895 catalog; "a valuable auxiliary in now made in the shape of a small level to be attached in place of the rule removed, forming an adjustable level to show any degree, thus greatly incresing the usefulness of the instrument." Patented Aug. 7, 1883. Vial still wet. MR1281$ 60.00 |
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