As a rule, any Pierce-Arrow wrench under 6" in length is one of their bicycle wrenches.
Bob, I don't think this is always correct. Thirty hears ago I showed what I thought was a Pierce Arrow motorcycle wrench to an older collector who had several Pierce bikes and motorcycles. I was informed in no uncertain terms that the bikes and motorcycles were not Pierce Arrow, only the cars were Pierce Arrow.
Your post jogged my memory of that discussion and I did some internet searching and came up with this info. at:
http://nbhaa.com/GTCC6.html and
http://nbhaa.com/GTCC1.html"The company that made the bicycles was originally the George N. Pierce Company of Buffalo, NY."
They were "built by the George N. Pierce Company of Buffalo, New York, who also made early Pierce Motorette automobiles. In time, the Pierce automobile became known as the Pierce-Arrow, while the Pierce bicycles and Pierce 1- and 4-cylinder motorcycles were built by the Pierce Cycle Co., a subsidiary of the original company. The Pierce Cycle Co. was headed by Percy Pierce, son of George, when receivers were appointed for it in 1910."
"The Pierce-Arrow was the automobile. The bicycle was simply known as "PIERCE," not Pierce-Arrow. Although the companies were originally related, the bicycle did not say the word, "ARROW", nor did the catalogues. An arrow SYMBOL was shown in the logo, but the word, "arrow" was never used in conjunction with bicycles made by this company..."
In fact, the name of this company officially was The Pierce Cycle Company. Furthermore, there was no such thing as simply THE Pierce-Arrow or even THE Pierce. There were numerous Pierce models each year for many years."
Here is a scan of a poor quality copy of a tool kit from a 1927 Pierce Arrow Series 36 automobile tool kit. Some of the wrenches pictured in this post are shown.