Colt Diamondback .22 LR Revolver – 6-Inch Royal Blue, 1978 D-Frame “Baby Python”
This 1978 Colt Diamondback in .22 LR combines the model’s sought-after D-frame “baby Python” styling with the scarce rimfire chambering, a 6-inch vent-rib barrel, and Colt’s legendary Royal Blue polish. Low production numbers for .22 LR Diamondbacks and its untouched factory presentation box make this revolver especially attractive to collectors who value originality and premium Colt craftsmanship.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Rifling Condition: Excellent – Sharp lands and grooves.
Specific Condition Notes: Minor surface scratches and small blemishes are present on the high-polish blued surfaces. The factory bore is bright and shiny with no pitting.
What’s Included
- Original Colt maroon wood-grain cardboard box with matching serial label
- Colt instruction manual for Agent/Cobra/Detective Special/Diamondback revolvers
- Colt Industries congratulations letter
- Factory yellow caution hang tag
Produced in 1978, this revolver carries an “R” serial prefix that aligns with late-production Diamondbacks. Colt built far fewer rimfire variants than the .38 Special versions, adding extra scarcity to this example.
The 6-inch carbon-steel barrel features a full-length ejector shroud and a ventilated rib with five rectangular lightening slots, mirroring the look of its larger Python sibling. A serrated ramp front sight is pinned into the rib, while a micrometer-click square-notch rear sight allows precise windage and elevation adjustments.
Colt’s Royal Blue finish showcases deep polishing and rich coloration across the barrel, cylinder, and frame. Checkered walnut target stocks with gold Colt medallions provide a comfortable, secure hold, and the wide, checkered target hammer compliments the smooth combat-width trigger for consistent double-action and single-action pulls.
Internally, the six-shot cylinder locks up tightly, and the excellent bore highlights minimal use. Combined with complete factory packaging and paperwork, this Diamondback presents a compelling package for enthusiasts seeking an original, well-preserved example of Colt’s premium rimfire revolver.