Coffin plane. Cast iron body, wall thickness 4 to 6 mm. Sole protrudes at front and back, rounded.

Body straight on the front sides, rounded at the back. 58 mm wide up to the mouth, which measures 9×41 mm.

Inside rear has a 40° edge, followed by a wooden infill 10/5.8×4.3×4.1 cm, rounded as an iron bed.

Iron rod Ø 7 mm, 53 mm long, runs through the side walls as a support for the wooden wedge.

Iron: 41 mm (1⅝")
Cutting angle: 40°
Mark: WARRANTED I. & H. SORBY / CAST - STEEL