This Gassiat-style putter is unmarked. It has an original alignment line across the top of the head and a wide brass plate on the sole.  The plate is held in place by five screws and provides protection to the leading edge of the putter. And is it ever a beauty!

These big block-head putters made famous by Jean Gassiat were introduced around 1913 and made in various styles by various makers during the ensuring years.  They are often called grand piano putters because they are big & heavy (for a golf club) made out of wood, and their rectangular shape is reminiscent of many 19th-century pianos that were also rectangular in shape.

This club remains in outstanding original condition, its original golden blond finish still strong and attractive.  The club has an original SQUARE shaft that is a single piece of wood that transitions to a pistol grip at its end.  The typical Gassiat putter had a pistol grip, only it used a second piece of wood to form the pistol part.  A very attractive piece.  

TCA2 v2 p537

This lot is in the accompanying group image.