We have no idea what the FVM patch is for. If you know, let us know. 12 or 13 neck. The item “Holyoke Boy Scout 1940’s Shirt with Insignia & Unknown FMV Felt Patch TH2 UF07″ is in sale since Tuesday, January 21, 2020. This item is in the category “Collectibles\Historical Memorabilia\Fraternal Organizations\Boy Scouts\Uniforms\Shirts, Shorts & Pants”. The seller is “tuscahanna” and is located in Monroe, North Carolina. This item can be shipped worldwide.