US Navy Machinist's Mate Challenge Coin - US Navy Rating Challenge Coins - PriorService.com
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Machinist Mate Rating Hat Patch | eBay
File:US Navy 040829-N-7884F-006 Machinist Mate 2nd Class Frank Cundiff completes calibration testing on pressure gauges using the 3666C auto pressure calibrator.jpg - Wikimedia Commons
US Navy Custom Ship Cap - Coyote - Machinist Mate | USAMM