Filletster plane.
Top edge chamfered, wooden wedge.

Right side: 0.65 cm thick, recessed at the bottom for the iron and shavings slot.
Front top: concealed pin or screw.

Left side: 0.75 cm thick, recessed 0.4 cm for the iron shaft and wooden wedge, otherwise identical to the right side and joined with it.

Iron: 14 mm     Shaft: 4 mm     Cutting angle: ⌀ 58°