The distributor wrenches were not marked Pierce as far as I can remember.
Ed is correct. They may or may not marked “Delco”””
The 1931 tool listing that I got from Greg Loftness a few years back did not list the distributor wrenches. I have to assume that the distributor wrenches were acquired by the owner separately.
Here’s one of the distributor wrenches.
The feeler gauges on the Delco ignition wrenches are different depending on the make of car for which they were made.
For those of you who may not know, the Pierce-Arrow Parts Catalogs for each year through 1935 contain a list of the tools provided with each car.