Groove base plane. Bronze plate 60x83x5 mm, middle section is a box 29 mm wide. Front part is 30 mm high, 11 mm with a sight hole 20 mm wide and 9 mm high. Rear part is 31 mm high with two walls, 30 mm long. In between, cut downwards at approx. 40°. On both sides, there are nicely rounded ebony pieces, 6x2.7x2.6 cm, with wide longitudinal grooves on the sides. The ebony is fastened with a screw from the top. Ebony wedge. Wedge holder, 7 mm round iron between the bronze walls. All bronze is a machined casting.

Iron: 12 mm, shaft 2x13 mm, 100 mm long, with a straight bevel at the bottom.