m53, Liner stamps and details

Verblifa, fibre, VB 1953 3

Shuberth, fibre 1960's(1)

Shuberth, fibre, 1960's(2)

Shuberth, thermoplastic, mis-stamped, SW 72

Shuberth, Thermoplastic, SH 88

Heinrich Ulbricht's Witwe, thermoplastic, U's 91

Heinrich Ulbricht's Witwe, thermoplastic, U's 93

Unknown(BEC), thermoplastic, BEC 87

Unknown(ECNL), thermoplastic, EC NL 78

Unknown(HL), thermoplastik, H.L. 80

3 different liners: left is a Fibre liner(these always have a vent hole), middle is a thermoplastic with venthole(until the mid 1970's) and right is a thermoplasticwithout the venthole.

Fibre liner with venthole and spannerbolt rivet. Fibre liners always have spannerbolt rivets.

Thermoplastic liner with venthole. Look at the different rivets between the fibre and thermoplastic liners.

Fibre liner neckband. A-washers are screwd.

Thermoplastic liner neckband with 2 steel fittings. A-washers cannot be removed.