I believe this is a 1965 rear differential. I haven’t popped it apart to see the gears or tell you the gear ratio.
Absolutely clean case with zero oil interior so I’m assuming it’s a fresh rebuild
Selling for a friend who’s husband pass a while back.
650.00 is a reasonably decent price
Will not answer any email without a phone number
Might be interested in a trade for a 1000 yard plinker