Locktumbler
I bought a cast case (Mk. 1) Irvine .75 "Mills" which also was sub-par, and had no serial number on the lug.
There is anecdotal evidence that the last Irvine "Mills" engines were assembled in the Far East, and not to the same high standard as the UK build engines.
Last edited by fiery; 06-08-2015 at 12:10 AM.