Surface Planer Blades & Sharpening Jig. (40495)

These came from a workshop clearance and one of the family had taken the planer so unsure what make it was. There are five pairs of cutters here all the same with only one cutter having a nick on its edge on corner of the iron. Each iron measures 6” in length by 13/16” wide and a thickness of 1/8” all are sharp, the ex owner has made a sharpening jig that these fit onto and clamp to whilst sharpening, in the bottom of jig is a recess that these irons fit flush in not sure if for a purpose?

Price is inclusive of postage to mainland U.K.