A year or two ago Greg Martin Auctions was offering a large number of one-off and limited production Colt 1911s, including a "Euro Match," serial number EUR500*. S/N EUR445 was recently sold by Bob Simpson. Greg Martin Auctions asserted that the run was of only 500 pistols.
Whether these were intended for European sales (the model concept, not necessarily this run) chambered in .45 HP (Hirtenberger Patrone, 1mm shorter than ACP) is an open question. Many countries in Europe forbid ownership of "military" calibers such as .45 ACP, leading to .243 Winchester S, Inc. M1As, .270 Winchester Garands, and other just a little shorter or smaller in caliber cartridges and chamberings. Thus, .45 HP.
*Boxed Colt Euro-Match Government Model Target Pistol, with Factory Letter
Serial no. EUR500. .45ACP caliber, 5-inch barrel, blued slide with paretial frost finish stainless steel frame. Right side of slidemarked “Colt 1 of 500.” Left side of slide with model designation. Maker and address on right side of frame. Wraparound rubber checkered grips with large C Colt logo inlays. Black hard case with handwritten label at one end of lid. Condition: Fine. Retained by factory as sample and display pistol. This modern firearm cannot be sold to a California resident who does not possess a Federal Firearms License. Estimate: $1,200 / 1,800
(Sold for $1300 plus buyer's premium)