If hand sewing, use a Glover’s needle. It has a chisel place and can make it much easier to sew thru the thick pores and skin on the badge/crest. Product of blue wool with white, purple, or buff facings, the frock coat became the conventional uniform for American officers by https://nghiahey82580.mybuzzblog.com/8061870/sewinguniforms-things-to-know-before-you-buy