Top edges rounded. Front open. Side cheeks each 0.45 cm serving as wedge abutments, front slightly recessed. Left side 2.8 cm from top, 0.5 cm wider. Right side 2.9 cm from top, 2.2 cm wider, slightly recessed. At the front underside, 4 mm bronze plate 74 × 11 mm on the left, with 23 mm edge fixed by two screws. Underside sole with 90° corner, tip upwards. Side length: left 3.7 cm, right 2.2 cm. Adjustable lateral fence to the right (regulates depth of chamfer cut): 13.4 × 4.4 × 1.3 cm, inner edge 45°. Two bronze inlays with 20 × 6 mm slot and round-head screws Ø 11 mm for fixing. Both screws can be shifted outward by 1.5 cm. Chamfer width up to 1.8 cm, with shifted screws up to 3.1 cm.

Iron: 31 mm; cutting angle ∠ 52°.

Marks: EDWᵈ PRESTON & SONS; TRADE MARK; around E P symbol.