All About Pocket Knives

I have a couple Stanley Axes marked with M on each side of the word Stanley. Anyone know what the M stands for?

these were produced by Mann Edge Tool Company.

mrwatch, much thanks. That was one of my many guesses

Would you happen to know the time frame of manufacture?

Stanley axes did not appear until the early 1970s.

Thank You mrwatch. Much appreciated.

and yesterday I got another Stanley axe head without the M.

I have only seen Stanley hatchets, so I looked them up on "Yesteryears Tools" It says they were making axes as early as 1913, and later, Collins may have made some, after they had been acquired by Mann. I'll have to keep my eyes open for an old one, Joe.