Ave!
Harness, 3-Ring Strap Divider, 2nd-3rd Cent., Stout!
Copper alloy; 58mm/23.9gm!
Con/ Minor corrosion, otherwise, As Cast with raised central dome.
Ref/ A&L 14.65 (sort of...read below)
Seller's Note/ After scrupulous examination, unlike the A&L example, there is no evidence of a fourth ring!