Four American lawn tennis racquets circa 1900 to 1930, i) THE NASSAU No.6 by A G Spalding ii) THE GOLD MEDAL MODEL BW, with unusual patented (1923) st

Four American lawn tennis racquets circa 1900 to 1930, i) THE NASSAU No.6 by A G Spalding ii) THE GOLD MEDAL MODEL BW, with unusual patented (1923) stringing at the sweet spot iii) THE STADIUM by Harry C. Lee, the first with a slotted shaft, as stated by Kuebler, re-strung iv) THE PIM by Wright & Ditson 1920 (Kuebler)