IT's just marked Mathieson Glasgow - about 2 3/8" of iron left to the slot (iron 2.5" wide of course). Not much of the iron is used and the cap is matching in wonderful shape.
It's sharp - someone was using it recently, long thin primary bevel with finer work only toward the tip. It smells strongly of linseed oil, too.
I don't know that much about mathieson's history, just that I like their plane designs as a basis to lift proportions off of.
They do often seem to have relatively low handles - someone with a hand 4" wide at the knuckles would find them cramped.
While folks in the UK may feel the price is high (59 pounds), it would cost that to make an iron and cap iron setup as nice these days.
Our planes in the US are derided (auburn, ohio)...at least the later ones after they were prison labor type stuff, but the bodies themselves aren't what are lacking - they can be fine, and often well selected wood. But the irons can be just terrible quality steel that crumbles at any hardness.
Mathieson irons are great, as are IH sorby and ward that often show up in griffiths,