Vintage Deltronic Machining Tools Tenth Plug Gauges 3 Different Sets With Cases

Vintage Deltronic Machining Tools Tenth Plug Gauges 3 Different Sets With Cases these are vintage. Comes with original certificate of authentic for 2 of them, last calibrated in 94 /97 by Northrup, dirty from the foam inside. I have had them for over 25 years. No longer in the field. Also there is 1 missing piece. (see picture). Husband bought from original owner over 25 years ago. Sets measures: Largest set: .0005 steps .4580 - .4695 (one with blue foam) .1543 - .1587 (last one that has one missing) MIL-P-3420D is number on it Great Condition - Minimal wear visible We are a smoke free and pet friendly environment. t-014