I came across this on Gunbroker. I wasn't really interested in bidding, but I tend to look at about anything in 16ga or 20ga. I have pretty much zero knowledge about any Ithaca guns other than the Flues accounted for more production than any other SXS of the era. The thing that caught my attention was the forearm. To me, the wood looks to be about the same age as the butt stock. Any chance that forearm wood is factory? Very different. I'm not even sure what I think about it. Just thought it was a curiosity. If it is a replacement, my guess would be that it was replaced a long time ago.
http://www.gunbroker.com/Auction/Vie...Item=329422958