I acquired a nice WW1 Mills 23 Mk III the other day and at first glance I thought it was Morum & Co , who were prolific Mills Grenade makers.
However the marking on the body was different. Normally Morum & Co have M & Co / L horizontally under the filler plug. L being for London or perhaps Lewisham, where they were based.
This grenade has M & Co on a segment vertically placed in much smaller letters. The Lever had another clue. It is marked M & Co M
Looking through the list of engineering suppliers for the Great War the only maker who fits the bill is George Mills & Co Ltd of the Globe Iron Works Manchester. They are listed as Mills grenade makers. I have seen George Mills before as he holds a number of patents mainly for railway related iron works and parts. However I'd never seen one of his grenades before and certainly not a base plug.
I'm making the assumption this is by him.
The base plug fitted was by Edwards Brothers so was probably swapped out over time.
Photos below.


However the marking on the body was different. Normally Morum & Co have M & Co / L horizontally under the filler plug. L being for London or perhaps Lewisham, where they were based.
This grenade has M & Co on a segment vertically placed in much smaller letters. The Lever had another clue. It is marked M & Co M
Looking through the list of engineering suppliers for the Great War the only maker who fits the bill is George Mills & Co Ltd of the Globe Iron Works Manchester. They are listed as Mills grenade makers. I have seen George Mills before as he holds a number of patents mainly for railway related iron works and parts. However I'd never seen one of his grenades before and certainly not a base plug.
I'm making the assumption this is by him.
The base plug fitted was by Edwards Brothers so was probably swapped out over time.
Photos below.

