Not listed in any of the golf ball reference books, this ball is stamped "C. Macintosh" on one pole and "Ranfurly Castle" on the other.  "Sound" testing the ball indicates that it is made out of either solid gutta percha or it has a thick gutta percha cover around a rubber core center. 

The ball shows normal use, with wear to the paint. There are two chips in the paint but no strike marks to speak of.  In the images that show the paint chips, it looks like the ball has lost a small piece of gutta percha, but that is not the case.  All that is missing is pretty much just a chip out of a thick coat of paint.Remember, that the images provided are much larger than the actual ball, so these chips in real life are not dramatic in size or appearance.

The surface of the ball is formed with the "Agrippa" 6-pole bramble pattern.  A rare ball for sure, and would make a valued addition to any serious ball collection.