I have found this to be untrue...
Pistols made approximately before serial 0T27XX were not of Mk1* specification and have no slide markings. They were only on slides of pistols made after this spec change which included;
Barrel lug changed from round to square.
Extractor & ejector modified.
Source of information - Inglis Diamond.
The designations for the Inglis pistols are: No1Mk1, No1MkI*, No2MkI and No2MkI*
The vast majority of both No1 (Tangent rear sight) and No2 (fixed rear sight) pistols were both originally at the Inglis factory marked ONLY with the "MkI*" portion of the designation.
If the No1 or No2 markings are present on the slide, they are (almost) always handstamped (post war in service) [the exception to this are the post war manufactured slides by CAL] to correct the model designation on the gun.
INGLIS DIAMOND HI POWER - C43351 - United States
Here is an "Inglis Diamond" No2MkI* and the model designation is clearly "MkI*"
The "Inglis Diamond" marked guns are said to have been manufactured during the last week of production.
Last edited by Lee Enfield; 08-06-2020 at 01:27 PM.