M1 questions

[Jettty Jay]

My father in law just gave me a M1 to try out. He has fired it and said it works perfect.
Heres my description:
Starting with the Barrel : "Underwood"
Below that : 1-44
Below that a flaming ball or bomb
Further back a stamped "P"
On the front of receiver is a stamp "US Carbine"
under that " 30 cal M1"
Behind the rear adjustable sight is a serial# 1065XXX
Under the sight I can see "winchester"
On the right side of the sight stamped on it is J.O.A. and a serial #
On the right side of the stock is the "cannons and ball" stamp.
The sling looks original. On the front sling band is "SI"
On the metal tube(oiler?) in the slot the tube is stamped SI
It has a metal butt plate with one screw.
On the right side just behind the magazine clip is a stamp of either a "M" or "W".
Any info would be greatly appreciated, Thanks, Jay

[M14man]

It would appear you have a re-arsenaled-rebarrelled Winchester. A good rifle. Maybe someone with a book at easy reach could give you more info. The SI is probably IS for International Silver. A small parts manufactuter.

[Jettty Jay]

Thanks, I read somewhere that Underwood subcontracted barrels for Winchester.
I thought that maybe SI stood for Standard issue, just a guess on my part.
I was told it was in an armory in New Mexico at one time. Prior to being confiscated from someone that stole it from a vehicle on base. My father in law was a police officer when he obtained it. Back then confiscated guns could be bought by the arresting officer after a period of time. Thats all I know about it. ~Jay~

Note: I did find out that a J.A.O. on the side of the rear sight means it is a type 3 Inland site. And that SI or IS does stand for international silver Co.
Another thing I noticed was a "U" stamped in the magazine well. Probably means "Underwood" trigger frame. ~JAY~

[jimb2]

An S.I. barrel band is like made by Simpro Manufacturing, not International silver. The Oiler; however is IS for International Silver. One of the problems with identifying parts markings is that there were duplicate markings which meant different companies depending on the part in question. JAO is J. A. Otterbein co. And Underwood used the ".U." not simply a "U". That would probably be Union Hardware. Confusing isn't it? The M on the tab of the mag catch stands for Modified. That indicates a late catch with thinner guide rails made that way to prevent jamming. If there is a makers mark, it will be either directly over the M or on the front of the catch. The barrel is a replacement. Winchester as well as Underwood manufactured more barrels than they used. Both contributed barrels to the "Free Issue" program that provided barrels to companies that didn't manufacture their own. Many of the "leftover" barrels were later used as replacements for worn out or damaged barrels. If the barrel had been originally used by Winchester, it would have a Winchester proof mark on it. The mark is an intertwined WP in an oval. That would be located on the top of the barrel under the barrel band. HTH.

[Capt'n Mil Coll]

Your "cannons and balls" stamp called an escutcheon or if it is in a square box it is a cartouche can actually tell you what company made the rifle. Depending on what it looks like. If you can get a pic I can tell you what it is.