Yes, the venerable Colt Model 1905 in .45ACP. The first .45ACP pistol.
Rare? Yes!
Valuable? Yes!
Value? Sky's the limit to a collector!
Interesting, I posted this the other day.... My "new to me" 1909 mfg Colt Model 1903 Pocket Hammer .38ACP.... You can see where the Model 1905 got it's start...
If it wasn't for the Colt 1900 & 1902 [sporting & military models] and 1903 [pocket hammer model] in .38 "Rimless Smokeless" [aka .38 ACP], there may have never been a Colt Model 1905 [the first .45ACP] which later spawned the venerable Colt 1911.
As seen with my 1914 mfg Colt Government model [top] and 1920 mfg Colt M1908 Pocket Hammerless .380 ACP:
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NAA.