[time-nuts] HP3336B S/N Question

[W4wj at aol.com]

So...  My HP3336B has TWO HP S/N plates...
 
The original plate:  2514A0xxxx
 
and a secondary HP sticker with: 2127A00xxx
 
Also there is another HP sticker with: 3040L  SYSTEM
 
Anybody have any clues on this??
 
TNX
 
73
Don
W4WJ