29.mm
Milled from solid brass, squared profile, feather key | 29.mm1
Milled from solid brass, squared profile, feather and tongue key | 29.mm2
Milled from solid brass, squared profile, tongue key | 29.mm3
Brass with rounded profile, patent boss, tongue key |
29.br1
Brass with rounded profile, patent boss single-tapped | 29.br2
Brass with standard boss, single-tapped | 29.br3
Brass with standard boss, double-tapped | 29.br
Brass, post-war stamped, double-tapped |