That could be EB. But the lower number has been filled with solder at some point and I think the finish has worn off of it faster than the rest of the bbl. Plus would they have gone backwards in serial numbers? I suppose it's possible.

Anyhow, I like the gun... headed out to shoot it now and it'll stick around..... unless I find some poor guy with a 16 who wishes it was a 12!

Shane