When this putter was first produced, it was referred to as the "Chantilly Putter," after Chantilly, France, the home of its inventor, the Marquis de Chasseloup-Loubat.  Jean Gassiat was the French golf professional who worked at Golf de Chantilly, in Chantilly, France. He was a champion golfer in his own right, defeating Harry Vardon in 1912 to win the French Open. Gassiat used the Chantilly putter as did others.

This example is marked "Jean Gassiat"  and was covered under a British registered design number issued in 1913. "Made in England" is marked on the sole. Most of the known Gassiat-style putters are not marked Gassiat. This one is.

The club has its original shaft along with its original pistol grip, described in an October 31, 1913 Golf Illustrated review as an "extra thickness at the top for the use of the left hand."

This putter shows normal use and remains in solid original condition.

TCA1 v2 p537