Rudder putters are among the most desired patent clubs, though very few examples exist. This 34 1/2" Aero-Put-Co Rudder putter is identical in every way to the rare Holmac Rudder putter, which only 5 examples are known to exist. If you look at page 544 of "The Clubmaker's Art" (2nd Ed.) by Jeffery B. Ellis, this club appears a perfect match to the Holmac Rudder Putter, which is one of the rarest and most desirable patent clubs.
The Aero-Put-Co Rudder putter is one of only 2 known to bear such marks. Also, the Holmac was made in New York, NY, and this club is marked Kingston, NY, which is less than 100 miles north of Manhattan. This putter is 34 1/2" long. It measures 4 5/8" from the face of the club to the end of the rudder. The rudder is 1 1/3" high. The face itself is 3 1/4" long and 3/4" inches in height.