United States Navy E-4/5/6 Machinist's Mate Rating Badge, Criteria: Worn by Machinist's Mates (MM) with ranks from Petty Officer 3rd Class (E-4) to
U.S. Navy Leather Flight Badge - TAN - USN Tan Flight Badges
US Navy Machinist's Mate MM Rating Badges Clear Stickers
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NAVY Men's E4-E6 Rating Badge: Machinist's Mate - White
Opinion Roundup: After the Ratings
can anyone tell me what this patch means? : r/navy
Aviation Machinist's Mate 3rd Class John W. Megginson, Jr. (1924
Patch - Vintage US Navy Chevrons Rating Badges – Hahn's World of
Navy Machinist's Mate Rating