I took this gun to my local, London trained gunsmith(I have been informed that there are three in my neighborhood) for a strip/clean, some minor repairs and to get a professional opinion. Here is what I learned:
1.Gun was made 1898 or before
2.Re-proof of 2 3/4 inch chamber was done in 2007
3.Gun is tight and on face- safe to shoot and recommends RST or other light 1 oz loads
4.Chokes are improved cylinder/extra full
5.Left barrel wall is thin and prone to denting
6.Back-action sidelocks with leaf springs
7.Knuckle pin is a replacement
Work being done on the gun is to make a new cocking lever pin, raise two small barrel dents, raise dents in stock, re-work/dress up various screws, clean and lube!