Early 1900s Arlington "Pyralin" black head mallet (patent applied for) putter. Pyralin was a type of vulcanized rubber. This putter has a shaft that runs all the way through the pyralin head. The top of the crown contains a small white piece of pyralin that acts as a sightline. A similar example is featured on page 314 of The Clubmaker's Art. Very good condition.