I bought several vintage plane irons on-line which were described as mostly Stanley.
The package arrived today and the description was correct - 5 Stanleys and 2 that I could not identify.
The non-Stanley irons were ones I have not seen before.
The first has "DHP" within a diamond shape logo:
DHPiron.jpg
The long side edges of this DHP iron were actually rounded - not sharply squared-off edges like I'm used to seeing.
The logo on the second was harder to see due to corrosion, but I had some success with a wire brush.
It appears to have the letters "T" and "H" on top of each other with the letters "C" and "O" at the bottom of each leg of the letter H:
Mystery_Iron_1.jpg
The other unusual thing about this iron was that the top was thin and the iron's thickness increased to the bottom bevel (top was .070", bottom was .180"):
Mystery_Iron_2.jpg
Has anyone seen these before?