I would hazard a guess that it is a bit of 'Lend Lease' equipment dating from early 1940's – probably something like a Millers Falls manufactured in Massachusetts USA. It looks to be something which may have been used in a REME mobile workshop or a LAD (Light Aid Detachment) mobile workshop of the Royal Armoured Corps, or even the American equivalent. Small enough to do a competent job but not of overpowering size as would be required in industry.
A few close up pictures may help! The finish on Millers Falls products was generally to a very high standard being black enamelled with red lining, but of course, war grade finish may have been the order of the day.
Well worth restoring and a valuable tool in its' own right.