Posted By:
Todd Schultzmy m101-6 range in width from 4 5/16" to a hair over 4 7/16", with a range in height of 6 13/32 to 6 1/2", so about 1/8" variance one way and a little less the other way.
Edited to add that I would beyond careful if I found one of these with sharp edges and corners, as the stock and of course age do not support them surviving in that condition (unless maybe they were glued onto something). They could have been trimmed long ago, I suppose, but odds are a trimmed m101-6 will stick out like a sore thumb, IMO.