New Member, Inherited Parker

[Pa SxS]

There is no rule, at least in ATA trapshooting. It is however a good idea. There are to many modern trap guns that look almost identical. The decals are usually orange and have a big R in the middle and are usually on the bottom of the pistol grip. It's very unlikely that someone now would pick up the wrong Parker unless you were at a vintage shoot but I understand the OP for siding on the side of safety.