US Navy 100 RPM B.S. Mk 15 TOTCO USA Military Disk Speed Indicator
The markings on the dial are: 100 RPM B.S. Mk. 15 Model 942 Disk Speed Indicator. TOTCO.
On the case is: Technical Oil Tool Corp. Los Angeles, California Made in U.S.A.
Needle seems to move fine
I have not tested this piece
Reset button works
Comes with 2 attachments and original case
Box shows some wear
No other issues noted
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