From an auction site comes this listing:
BM150255 Mathieson, Glasgow A rare and important first pattern Mathieson panel plane. These early Mathieson infill planes are still a bit of a mystery to collectors. It is know that later Mathieson outsourced production, primarily to Norris, but little is know about these planes. Literally only a handful are known. They even made a mitre plane version that had an adjustable mouth, the only British mitre plane with this feature that I am aware of.
This plane has been in my collection and before that was in an important Scottish collection. It is 13 5/8″ long and weighs just over 8 pounds. The attention to detail on these planes extends to even shaping the top of the iron to match the rounded shape of the bun. They are true masterworks. This plane has a lovely even patina on the body. There is an old and clearly stable hairline crack emanating from one of the screw holes and running to the top of the casting. The maker’s mark was struck a bit unevenly and is faint on the top.
When I got it, the hole for the strike button had been plugged with filler and dark spray had been used to obscure the primitive work. John Porritt, master restorer, cleaned off this obscuring spray, removed the filler in the hole, and installed a new strike button made from yew. He then repaired the finish to match the finish in the rear. If you are not familiar with John’s work, it is so good that you usually can’t spot it. I often see his work being sold without any mention. This tool is a must own piece for the advanced infill collector. For the connoisseur. G+ $4895
and one more