Ha, Cannonball, thank you, you're no doubt right about N113. I had read Albert's comment after NA 112
"There are many post 1850 makers and variants, as this pattern was in use until 1941"
and I assumed he was refering to the eagle on anchor, head right, circle of rope etc., of which N113 seemed closest of those illustrated. I didn't take size into account as I probably should have. (we've seen illustrated variations of the Navy button of the era as small as 15 mil, so I don't know if this pertains to Albert's comment, but hopefully you can clarify for me.)
After reading Keith's last post regarding my question about the back was rusted , he had said "corrosion and pitting". Maybe he can come back and explain if he meant rust or run a magnet over it to be certain? Anyway, thanks again J.