Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver (1972)
Final Auction Price: $2,284.00
The Colt Python Model I3620, manufactured in 1972, represents one of the most finely crafted double-action revolvers ever built. Chambered in .357 Magnum with a 2.5-inch vent-rib barrel, this early-production Python features Colt’s hand-tuned action, iconic ribbed barrel profile, and blued finish—a combination that has made the Python one of the most collectible revolvers in American firearms history.
Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver
Identification
Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver (1972) Identification
MMA#: 250522JA001
Make: Colt
Model: Python, Model I3620
Serial Number: E36647
Year of Manufacture: 1972
Caliber: .357 Magnum
Action Type: Double and Single Action revolver with swing-out cylinder
Barrel Length: 2½”, vent-rib, full lug
Sights / Optics
Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver Sights
The rear sight is a square-notched, fully adjustable unit pinned to the frame and adjustable for both windage and elevation. The front sight is a serrated ramp blade pinned to the top of the barrel rib. The top strap and barrel rib are matte finished to reduce glare—typical of factory Pythons of this period.
Stock Configuration & Condition
Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver (1972) Stock
Two-piece checkered walnut grips with gold-colored Colt medallions. The grips show only light handling marks; the checkering remains crisp and well-defined. Overall grip condition: Excellent.
Finish & Overall Condition
Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver (1972) Finish
Type of Finish: Blue
Finish Originality: Refinished
This revolver retains approximately 90% of its blued finish. Some light pinprick surface erosion is visible beneath the finish, mostly on the sideplate, with minor dings under the topstrap. There are faint nicks and scratches, primarily on the right side of the frame, and areas where the blue hue appears lighter. Screw heads range from sharp to lightly tool-marked, and all markings remain clear. Overall rating: Fine.
Bore & Mechanics
Colt Python Model I3620 — .357 Magnum 2.5” Blued DA/SA Revolver (1972) Bore
Bore Condition: Bright with sharp rifling; minor surface erosion in spots. Rated 9/10 by the writer.
Mechanics: Action functions correctly. Lock-up is solid with no cylinder play when the trigger is depressed. Features a wide target-style hammer and a serrated trigger.
This revolver has not been test-fired. As with all used firearms, a professional cleaning is recommended prior to use.
Box, Paperwork & Accessories
Included: force-matched Colt box, factory manual, and Colt letter verifying configuration.
Our Assessment
Introduced in 1955, the Colt Python quickly became synonymous with precision and performance. Each example was hand-fitted and tuned by Colt’s master gunsmiths, resulting in a revolver that many regard as the finest production double-action ever made. This 1972 Python, with its short 2.5” barrel and deep blue finish, reflects both the craftsmanship and collectibility that define the model.
While this example has been refinished, it retains its sharp mechanics, tight lock-up, and bright bore. Compact, elegant, and mechanically superb, it represents a desirable combination of vintage Colt heritage and functional performance—a worthy addition to any serious revolver collection.
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