Need help identifying cannonball like object

[Airstrike]

Help requested in identifying an unknown ball.
The ball weighs in at 5 lbs 15.1 oz. The diameter is approximately 3.557 inches. It has a mold seam and what appears to be raised numbers 1 1/4 (no slash mark). It came in an auction box lot back in the early 1980's with a couple of CW bullets. I have no idea what it could be. Any suggestions?

 

[WindHarvester]

Shot put?

Maybe

 

[baspinall]

I quess the same thing.

http://www.trackoutlet.com/index.php/cPath/78?gclid=CMyG7e35pJQCFQIqHgod1lz2uA

 

[surfin]

you can get an exact diameter and check the cannons of the cival war at your library by size. then try to match it. a shotput wouldnt have raised numbers on it but niether would a cannon ball. It could simply be a wieght. is it hollow at all?

 

[Dman]

I believe it s a shot put.
Dman

 

[Slingshot]

My guess would be the busted off end of an old dumbell.