The images are dark & tiny. very hard to read clearly.

Can you post some larger, lighter ones? That would be a big help.

Natural window light is much better than flash s well & a darker background would help lighten a lot.

From your post.

It was made in 1917 in the reign of King George the Vth. Possibly by Birmingham Small Arms (because of the "ShtLE" identifier which was BSA's way of saying "SMLE", no matter, they are the exact same design.

Its a Short Magazine Lee Enfield (SMLE), also known a "Rifle No1 MkIII *", a simplified update to the earlier No1 MkIII (no star). No mater all these names indicate the exact same rifle.

It was made for military use, not civilian sale (the "crown" (Royal Cypher)) tells us this.

"I 7300" is the serial number & should be found on the receiver, barrel, under the rear sight, bolt, nosecap bayonet boss & under the forend, possibly on the bottom of the magazine also, but maybe not, not all were numbered. Matching numbers matters because little hand fittings were done to make it good & safe & the numbers track this. The prefix letter denotes the "lot" made, the number rotated from nothing through "A" to "Z" & then "AA", "AB" & so on.

Stamps to look for:

Crown NP, or Crown BNP, Civillian proof tests, may also have "2.222" & 18 1/2 ton (a square). Pressure proofs for civilian purposes. Not use or required my military, & so indicate a sale to the commercial market. A "Star" (actually 2 facing & touching "Broad Arrows" (birds feet)) denote removed from military rolls. These are fairly large. A small asterix on the breech indicates something else, as does thew one after the Mark & model information. Also look for an "FTR" stamp, these indicate a factory rebuild at some point in its life. Not a concern rifles were routinely overhauled, upgrade to the current model & refurbished.

There will be many, many small stamps everywhere. These are inspectors check stamps & many of them checked many things, bit they & the items checking or gauging are mostly lost to history. Its military history is harder, they weren't really checked IN & OUT that much, so much of it is also missing. Some had a brass d**k about the size of a nickel inletted with a unit code, but yours seems to gave been removed or never inlettt. Again no biggie many were as it gave away information if they were captured.

If you take a look down in the "Info for new owners" & "links" sections, there's a couple of resources for markings & some links to even more.

Give it a shot you might get lucky!

IIRC its an old proof mark?

Birmingham Nitro proof!

This gun was presented to my Father in Law in recognition of his service at a munitions factory. Test fired once at the factory. Recently cleaned and test fired by a gunsmith. Does anyone have any information about this gun? It is not stamped US Property. I have the original owners manual along with a letter from R.R. Klanderman, Colonel, ORD department Field Director of Munitions Plant Joliet, Illinois. I have someone interested in buying it but have no idea of the value or history

If it’s an unissued rifle in excellent condition, it would be worth north of $1200 USD.  Probably not many Savage Mk I rifles still around, the Mk I* with the simplified bolt release and 2 groove barrel was introduced shortly after the start of production in 1942 with serial numbers in the 7C8xxx range. 

It would be better to start your own thread on this rather than adding on to an existing thread about someone else’s rifle. 

It would be an honour to own such a rifle! I'm not trying to be argumentative; I just don't understand why anyone would not want to keep it in the family! 

If it has the early front sight button cocking piece and is indeed a Mk1,  here in Canada, the price would be pretty greedy, way north of 2 grand.

But as the others have said it`s a legacy piece, unless your not a gunner then the point is moot.

As for Tpb234`s rifle its a 1917 made `Enfield` SHt LE so 107 yrs since its birthday. Can`t tell from the pictures if it was through an FTR. During the  WW2 RAF rifles were issued blue slings so it could be an "air force rifle" Looks very nice and complete.