Older curved standard form.

Iron holder with 8 mm screw, thread metric 60° DIN 13/14 1.25, with slotted head 16x24 mm, 8 mm wide.

Slot 14x6 mm for the iron, total length 59 mm.

Rear metal insert 40x27 mm with 8 mm hole. Bronze wing nut 38 mm.

Iron: 14 mm
Cutting edge: 19 mm wide
Angle: 25 mm, 85° bent, bevel 32°