I will try a post for pics also. WW I No.1 Mk.III*s. First pic top to bottom. 1916 Enfield; 1917 BSA with matching number windage sight and steel buttplate with brass trapdoor; 1918 LSA, only 50,000 made; 1918 SSA with Canadian "C" mark; 1918 NRF navy "N" mark on left side of wrist. The * was cancelled and a cutoff slot was machined into it sometime after WW I. Second pic shows 2 tone buttplate.