I thought this was one of our original shock retainers (one on the right).

Still has the trunk spatter on it but it measures 1.5" in diameter??

Other originals I have have similar design bur measure in that 1 3/8" ballpark (1.390").

Now I'm not so sure it was off our 68 but have no idea where else it would have come from???

Has anyone observed or have these 1.5" shock retainers/washers?

The AIM calls out the same part# shock retainer for the front and rear shocks.