Tachometer Illumination Bulbs

[LarryRPH@aol.com]

Anyone know where to get the little bulb used to illuminate the Tachometer 
(BN 6  cable driven - not electronic if it makes any difference).   It  has the 
same shape as the old screw in type flashlight bulbs but is obviously 12 volt. 
    My Whitney catalog shows what appears to be the bulb on a picture but do 
not identify it and sell only an assortment of 10 different bulbs.
   
Anyone know the type and source for theses bulbs

Larry Wysocki

BN 6