N4 Mk 1 model.Number on barrel 303.  222” ?

Number on bolt N3K5

Number on top of rear sight MK 3

I would like to know where it was made ?

Year I think is 1942 ?

Any unique things about the gun ?

What value does it have ?

I have tried to include pictures but don’t know if the will be visible to members? 

some of the info is helpful and some not , as a no4 mk1 and thinking 1942 it would make if a brit made rifle rathger than US or canada , by 42 they were not making mkIs anymore they were mkI* at that point , 

if i still had my references [in the hands of others]here] the M prefix might help and the serial should put it to a contract - top of my head i would say BSA but do not know that factually , the number indicates first contract and that would coincide with 42 date fairly well this info should be on the left side of the receiver, 

 

bolt number should match serial , i think what you gave us is a steel marking , the rear sight number you gave is the marlk of the sight , a later version , if you look at the back of the sight you should see serial number match i think , the 

value will depend on condition and original configuration - we need photos for that 

someone else may have more to add but didnt want your post unanswered in timely fashion , 

The first number of the serial number gives us the manufacturers identity for the UK built rifles.

1= Maltby.

2= Fazackerly

3= BSA ( Birmingham Small Arms)

The rifles made in the USA by Savage have a C in the number sequence.

 The Canadian made Long branch rifles have an L in their number sequence.

The serial number on the rear of the bolt should match that on the receiver/action.

Barrel condition will depend on how well it was cleaned before being put away for 50 years.

As the others have said, your rifle is a No. 4 Mk I Lee Enfield.  We will need photos to confirm the details. A few pictures showing the overall rifle (to see if it’s been sporterized and the general condition) as well as closeups of the markings on the left side of the action body (receiver) and back of bolt handle.   With this, we can give you an idea of current value. 

As Zed has already said, the condition of the bore will depend on how well it was cleaned and protected for long term storage.  55 years ago, there was a lot of military surplus Mk VII ammunition around, some (perhaps most) used corrosive primers.  

Millions of these rifles were made, and unless it is a very rare version (unlikely) or in pristine un-issued condition, its value is probably not going to exceed $800 - $1000 CAD.  

I hope the gun was cleaned for corrosive after that firing!

Stored for that uncleaned after firing surplus ammo would be a very bad thing!