Complete reproduction. The good news is, I found a use for these! You have to make all the internal components (fuse well, fuse, fuse ignitor, "ceramic" bead, pull/string, etc.) because can /handle is completely hollow, but it beats cutting up a $300-$500 piece of antique ordnance!
Actually the only 2 things in this entire picture that are authentic are the very bottom of the "M39" fuse (pull friction compound) and the frag sleeve. I made all other internal components & of course gave 'em pair jobs.