Nice looking disk. I have a similar JD made about the same time and same size and it appears a lot more "flimsy" than the Killefer. Killefer looks well made.
Yes good heavy disk.
Nice one! Thanks for the photos; I have seen similar, with the inverted angle iron frame, not "boxed" like yours, and a trough to toss rocks or whatever into for weight. Rebuild was reminding me of my rice ranch days; they had a really nice SWECO fifth wheel implement carrier used for hoisting the Towner disks for rebuilding; made life easier for everyone. I saw a glimpse of yours, just as I was wondering how you split your disk. Hah! Looks like you spared no expense on yours. Very nice. I like the cast weights too. JM