3M 22397, Roloc Disc 361F, 60 YF-weight, TR, 1-1/2 in x NH, 7000045097 
Insize 4799-1300, PROTRACTOR, 11.8×19.7″, 0-180?, 6928640317439
$107.44
Graduation 1?
Made of carbon steel
Satin chrome plated scale.
With clamping screw.
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