Knowing the gun's hidtory is a big plus. I generally record this and keep in a file as its proves "provenence".

Just a few more questions as I think were are closing in on what you have;

1. Confirm barrel length. You can do this by inserting the bolt; putting a cleaning rod down the barrel to contact the bolt face; mark with a piece of masking tape; withdrawn and record the measurement.
2. Show us a clear picture of the front sight.
3. Show us a cleat picture of both swivels.
4. Are there any stampings on the brass butt plate.
5. You magazine has a front loop on it. Does you triggerguard have any evidence of a loop?

The rifle is a commerical BSA....just need to determine which model so we can point you in the right direction for parts/restoration.

Hope this helps,

Ron