Post a photo of the barrel stub, where the date is, we can tell you more. 1943 means wartime production, generally speaking the exterior of the receiver is a little less "finished" than pre-war rifles.
Here are a pair of
Izhevsk Mosins, denoted by the triangle with arrow. Compare the receiver machining, look how rough the 1943 is compared with the 1939. It doesn't effect how the rifle functions, but you can tell they took less time on the wartime example.
And a 43 Tula with the star/arrow. It is a PU Sniper, that is why the "CH" and extra S/N.
The container has two caps because it has two compartments, it was designed so one side had bore cleaner, the other oil.
Lots of info on barrel markings here:
http://www.7.62x54r.net/MosinID/MosinRef02.htm
And accessories here:
http://www.7.62x54r.net/MosinID/MosinAcc.htm