Dick, the checkering on my O grade and Ideal are still I believe considered flat top and 18 lpi, compared to the 00 and Field at 16 lpi.
Here is a picture of my 16 ga. 0 grade that some previous owner was proud of it and carved his name in the stock. I left it there for posterity.
I left the dings and scratches as I found it just cleaned the wood and moved the old shellac around it.
Runs, what I was trying to say that a restored gun that is now in 100% condition as it left the factory is only worth 60% in restored condition.
As to what Keith stated, very true if you do not have the ability to take one apart.
I made it a point in the very beginning to know how to do this and the first one was hard to put back. Now, I take them all apart when I get them, mostly for a good cleaning and some refinish if needed.
As to the alcohol, you would have to apply it very heavily to take the shellac off. A clean lint free cotton cloth wet with alcohol will remove old dirt and if done right will re-amalgamate the shellac in areas that were sparse.
jlb, yours was ordered with a POW grip, not something you see much compared to the capped pistol grip of most.
Clean it up and enjoy it.
The chambers would be 2 1/2" and I would shoot the appropriate shells through them. Removing any pitting removes precious metal especially if near the breech.