This is for an original set of Burd's Piston Rings, containing 3 different sets of 8 rings. This is in the original box and is numbered 7121. These are for a 1954 Oldsmobile 88 or 98 and a 1955-1956 Oldsmobile 88, Super 88 or 98. Box still contains the original "Packed By" slip, as well as the Burd Piston Ring fold-out insert. This insert M50-8-56 on the bottom, which I think means these might actually be from 1956. Inside the box are three interior boxes, each with 8 rings.

Included are:
Top Groove 3 7/8 x 5/64 Type: BB-620 Hvy. Comp.
2nd Groove 3 7/8 x 5/64 Type: XS-520 Hvy. Exp. Scr.
3rd Groove 3 7/8 x 3/16 Type: All Steel Oil
This comprises a complete set. Outer box has edgewear and discoloration, along with small tears. Rings are unused.

We don't usually sell stuff like this, but any questions, please ask, and I'll do my best to answer!