These three mallet putters are from the Fred X. Fry collection, and their shafts bear his inventory labels. 

The black head appears to be either coated in a black composite or made from a solid black rubber or plastic of some type.  The Back of the head bears seven circular lead backweights, with the lead back weight on the heel and toe consists of lead inlaid in brass. Its possible that the brass runs the entire length inside the head. An x-ray would be needed to confirm. 

Fred Fry's inventory page for the Brass and aluminum head mallet putter with yellow pyratone-covered steel shaft records that this club was "a special forged "Dudley" model for "Wes Miller" of Pasatienpo CC - Santa Cruz."  Miller gave the club to Fry in April of 1939, and his name is stamped on the sole.   

The Aluminum mallet with the rectangular steel block inlaid across the face and attached with a screw in the back of the head was made by Spalding although it is not marked "Spalding." It has "Fred X Fry" factory stamp in a beautiful script across the top of the head. FXF owner's initials are stamped on the sole along with a Reg No 8-8192.

All three of these putters are in nice condition and have their original shafts and grips and measure between 34 and 35" in length. 

Fred X. Fry, the dean of American golf club collectors, was busy building his collection forty years before the Golf Collectors Society (now The Golf Heritage Society) was formed in 1970. Collecting with great passion, Fry amassed around 450 clubs, mostly putters. He cataloged, displayed, and cherished his treasures.  A number of national magazines ran articles about his collection of putters between 1936 and 1963. For more on Fry, and to view some of the articles, Click Here.