It is a Savage No 4 Mk 1*. At the time that rifle was made, US at the time was pretending to be neutral in the war (this was before the US entered the war) and the UK was absolutely broke fighting the Nazi's alone. So, President Roosevelt initiated the "Lend Lease" program. The US "lent "war material to the UK, who promised to send it back at the end of the war. This fiction fooled no one at the time, the US was providing war material to the UK, but was not at war with the Axis, and the American taxpayer was paying for this. It was great for business and WW2 got us out of the depression. After Pearl Harbor it was no longer necessary to pretend but I don't know if the markings stopped or not. Might have kept on.
The No 4 MK1* rifles, which were also made in Britain and Canada, had a number of cheapening features to make the things quicker to manufacturer. Check your barrel and see if it is a two groove, that was one characteristic of the Savage rifles. Those barrels actually shoot cast bullets better than the five groove barrels. The trigger was attached to the trigger guard and not the action. After the war, the MKII versions went to a different bolt head dismount, the trigger was attached to the receiver. As war time rifles were rebuilt, they were upgraded to MK2 features. You can read about the upgrades, in detail, at this web page:
All About Enfields
http://www.allaboutenfields.co.nz/no4s/no4-mk12-mk13-mk2-and-ftr/
The wartime versions of the No 4 Mk1* had inexpensive flip rear sights, some more complicated than others, but this Savage has the cheapest of them all. With a bayonet the rifle was supposed to shoot to point of aim at 200 yards, and without, 300 yards. I have never verified this, but the regulations of the period required that the bayonet be fitted when within 300 yards of the enemy. I suppose you asked the enemy where he was, and attached or removed the bayonet based on the answer you received. (Marco!, Polo!) The front sight was zero'd at the factory and a special slotted screw was installed in the base to keep the troops from personally zeroing their rifles. From what I have read, the rifles did not shoot to point of aim, but since Soldiers were not marksman, no one really noticed. My Uncle had nine rounds of familiarization with his M1919 machine gun before he parachute dropped over Normandy. His squad was so unfamiliar with the weapon, did not understand the thing did not have a safety, that setting it up in combat, they inserted the belt before putting out the bi pod. The guy handling the muzzle bumped the trigger mechanism on the ground, the machine gun discharged, shooting off a finger! Sammy, our oldest gun club member, till he died, had a total of 20 rounds fired before landing on Iwo Jima. He claimed he went into combat with a rifle that he had not zero'd, it was issued to him as he went on the ship! Sammy asked his buds to spot for him, in combat, under fire, and he knocked the rear sight of his carbine, to zero his weapon, real time!
The bolt dismount notch, a characteristic of the Mk1*, is just behind the bolt head, right side of rail.
My friend just bought this rifle and brought it to me since I’m a mil-surp collector but Lee-Enfields are something I know little about. Can anyone tell me what these markings are on the receiver and why one of them is crossed out? Thanks in advance.
