The short 6 ½-inch-long grip on this early 1900s club is old, and the shaft is only a 32 1/2" long. Both these elements fit the needs of a one-armed golfer.  The short grip that accommodates just one hand is made to order, and the shorter shaft is easier to control when playing a shot using just one arm.   

The February, 1906, issue of Golf Illustrated reported that the number of one-armed golfers was larger than most people might think:

Ever since the recent performance of a... one-armed golfer was chronicled some days ago there has been coming in a steady stream of statistics concerning other one-legged and one-armed golfers until one is almost persuaded to believe that if there is not a majority of these crippled players, at least they constitute a very respectable minority. Writing from Oxford Mr. K.M. Beaumont reminds me of the case of the one-legged caddie-master at Elie who plays an excellent game, and who has won several prizes in competitions. He is reckoned better than scratch. The case of Mr. Foster, of the Register House, Edinburgh, has already been recorded. Mr. W. Dalrymple, writing from Leven, and recalling several instances of crippled golfers, says that Mr. Ireland, late Hon. secretary of the Thistle Club, told him of a man playing golf who had actually lost an arm and a leg!

 Some onc-armcd golfers were very talented players:

A one-armed golfer, named Willie Park—not the ex-champion we need hardly say—has holed the eleventh hole on the Troon relief course in one (Golf Illustrated, 1 Mar. 1907:182).

One-armed Entrant for the [Open] Championship. ...The appearance of Yves [Botcazon], the one-armed professional at La Boulie, at Prestwick, will be quite unique (Golfing, 3 June 1914:7).

The technique of Louis Martucci, a one-armed golfer who became the professional at the South Orange Field Club in 1917, was pictured and described in an article titled “Lessons of a Onc-armcd Golfer” (Golf, ny], 16 Aug. 1916: 74-77).

In 1909 Golf Illustrated reported, complete with pictures, the results of a match between two one-armed golfers. Both players had only their right arm and played from the “right hand” side of the ball. Serving as the reporter for this article, Harold Hilton (two-time British Open Champion, four-time British Amateur Champion, and once U.S. Amateur Champion) was quite impressed with the quality of play.

 After World War I, there were even more one-armed golfers.  These men, who suffered in war, did not give up on living.  This is a special club.

For more on one-armed golfers and their clubs, see TCA2 V2 p598-600.