Winchester 1866 Saddle Ring Carbine - Newie Seeks Help|Page 2|General Discussions & Questions|Forum|Winchester Collector

Dave,

Here is a check list of features on the 66 so you can determine is the gun is all from the same era. This came from a collector who uses this to double check a gun before buying. He compiled it from several books and personal experience.  Some number ranges will over lap or have gaps since it was compiled from different sources. I give no guarantee to the accuracy of any information.

Serial numbers begin at 12,000. 1st models 12,000 to 19,000 – 2nd models 19,000 to 25,000 – 3rd models 25,000 to 149,000 and 4th model 149,000 to 170,000 these numbers are approximate. 1st models have a extra wood screw on the top tang behind the hammer. The serial number is on the top of the stock & left side of the lower tang. From 19,000 to 139,000 the serial number is on the bottom of the tang behind the trigger and after that the serial number is at the rear of the tang in a script style. Below serial number 20,000 the butt plate has the complete serial number on it usually. 23,000 to 60,000 the butt plate 4 of the digits and after 60,000 they have only 3 digits. After 150,000 the use of assemble numbers started instead of serial numbers. Before 16,000 they had a small font assemble number on the side of the tang forward of the serial number and one each side plate and the top part of the frame under the left side plate. Butt plates were of the crescent type below 100,000 for rifles and carbines. From 102,000 to 160,000 carbines mostly had the carbine style. After 160,000 the carbines went to the steel carbine butt plate.

Forearms on 1st models are the same width as the receiver. 1st and 2nd model carbine have a forends 1/2″ shorter. Below 15,000 the frame and forearm wood were the same width (flat side) and after the receiver was flared out.  The forearm caps are brass  on rifles up to 135,000.

All 1st and early 2nd models do not have  a 1/2 cock on the hammer. The hammer knurling has a boarder after 165,000. Levers have a smaller loop before 100,000 and mixed to 120,000. The loading gate on the early guns below 15,000 was flat . Bolts below 35,000 do not have a oil slot on the extractor. From 35,000 to 43,000 there is a mix of bolts with slots and without and the slot will be a straight cut across the bolt up to 128,000. After 128,000 the slot was changed to a oval milled on the top. The front top opening of the receiver on the the first 102,000 is straight and after that there was a notch added.

The magazine cap is threaded into the tube until 155,000. Below 102,000 the chamber is recessed for the rim of the shell. The caliber was marked on the barrel on some starting around 156,000 and by 166,000 they all were. You can have 5 or 6 land rifling to 70,000 then 5 land to 154,000 then it went to 6 land to the end. The rear barrel sight  on a carbine is marked 3 & 5 up to 155,000. The front sight on a carbine is part of the front barrel band until 152,000.

Between 167,000 and 169,000 one thousand C.F. guns were sent to Brazil.

Bob