May 07, 2020 10:00 AM EDT Cincinnati


A Rare and Very Fine Colt Model 1860 Army Thuer Conversion Revolver with Percussion Cylinder

.44 caliber, 8" barrel, S/N 154503 manufactured in 1865. All Thuer conversions appear to have been sent to England and 154503 is no exception with the small "L" appearing below the serial numbers. Correct Thuer conversion cylinder with British proofs. Ring correctly marked Patent Sept 15, 1868. Serial number on cylinder is "632" otherwise all numbers match with exception of the wedge number 4511 likely a factory error (i.e. eight numbers off). Loading lever with plunger relieved specifically for Thuer conversion. Varnish figured walnut grips.  


Barrel retains much original bright blue finish mixing with brown and flaking. Some battering on right side of barrel around the wedge. Cylinder retains strong blue finish especially in rebated areas. Thuer conversion ring with much original bright blue. Hammer with considerable cased colors. Loading lever with some rainbow case colors present. Frame with much faded base colors. Frame screw with considerable blue remaining. Triggerguard with matched original bright blue flaked on on front strap. Back trap with considerable original bright blue. Screws are generally very good to excellent. The loading lever screws with damage to slot. Figured walnut grips retains much of what appears to be original varnish with minor marks and none of the usual chips. Mechanically excellent. Bright bore with some very minor corrosion.

Revolver is accompanied by a London proofed percussion cylinder number 4278. Cylinder retains nearly all of its original blue with some flaking. Pin safeties mostly intact. All together one of the best of these Colt rarities to be offered in recent years. 

Estimate: $10,000 - $15,000
Price Realized Including Buyer's Premium

Internet Bidding

Have a Similar Item?

Consign With Us

Let Cowan's Handle Your Shipping!

Cowan's Auctions is one of the only houses to offer full service, in-house shipping.  

Shipping costs are included on every invoice to make getting your items as fast and easy as possible. 

ADVICE TO INTERNATIONAL BUYERS. Cowan’s will not ship any package containing a firearm to any location other than within the United States. Buyers outside the United States must make their own shipping arrangements taking full risk for the transportation of any firearm.

For more information, click HERE or contact