Large Tombstone Milling Fixture with three 16″ Bison 3205-15 3/4 Scroll Three Jaw Chucks

Chucks:
Two Bison model 3205-15 3/4 scroll chucks.
400 MM (15.75″) diameter
190 MM (5.75″) through hole.
Link:
https://store.bison-chuck.com/us/en/3-jaw-self-cent-scroll-chuck-3205-16.html

Tombstone:
Welded construction.

Total weight: 1,700 pounds.

Chucks have been inspected and jaw slides, master jaws and scroll show little wear.
Jaw slide was measured (see photos). Results: .0005″ maximum wear.