John S-Herb sure knows his tone knobs! 
The earlier bakelite type with the "pinched top" and three or four vertical lines grooved into the two opposing sides are very hard to find these days-Every guitar show that I go to I look in people's boxes of knobs for sale to find them-I found two many years ago that were desperately needed for a 1964 guitar that I owned then-but not a one since-They are even more rare in brown color-1969 seems to be as good a guess as any for when the change was made to the later type "skirted" knob 
[This message was edited by PAUL WARNIK on 22 January 2004 at 09:28 AM.]
