Gweno:
According to the 1999 Standar Catalog of Firearms Colt produced the 1903 Semi-auto Pistol in .25 Auto for the Military. Don't know how many, but some were issued to Gen Officers.
It would seem, (in my opinion) according to the photo attached, that if it was a General's Issue, it would have come with the belt holster as shown.
Sorry for the condition of the photo, couldn't get it clear.
HJN:m:
