Oval shape with rounded edges on top. Front radius adjustable device with adjustment screw at the top in the 42x12 mm mount with two screws, bottom radius adjuster 50x13 mm. Radius from approx. 30 cm.

Double iron 51 cm = 2 inches American.
Cutting angle approx. 50°.

Marking: WARRANTED around a portrait, below:
I∗SORBY CAST STEEL
on cap: WARRANTED STEEL

64-55 Broad St. Bloomsbury London. (A really very beautiful plane, unfortunately it is missing accessories and irons).