M 43 Soviet Chemical troops- combat flamethrowers and smoke troops sergeants US made gymnasterka

M 43 Soviet Chemical troops- combat flamethrowers and smoke troops sergeants USA made gymnasterka, cotton US cloth used. Most of such USA made gymnasterkas has USA 4 holes plastic buttons, back waist strap.  There are hooks instead of  buttons closure on the collar . All US made jackets seen by us  is unmarked, just sometimes it could has a sewn tag of depo on it.   Flannelette hard shoulder straps with brown stripes and crossed wrench and hammer tools insignia - M43 Chemical troops insignia.  It's not a railway as most collectors think. The similar insignia appears on the civil railroad uniforms much more later.  Nice condition, slightly worn example. Size 118 cm breast, 62 cm cuff