I recently got a chance to check out this beauty.
Intact M1911 models are rarely encountered even though some 650,000 or so were made between 1912 and 1925. After that time, most still in military stores were reworked to the updated M1911A1 standard which saw a different mainspring housing and small parts. Further arsenal rebuilds saw blued finishes replaced with a heavy parkerized coating. Likewise, such reworks will have a variety of arsenal codes (AA, SA, RIA, etc.), which this pistol does not carry.
As the price of even Black Army models skyrocket, nicely blued military-marked M1911s will likely continue to gain value.