Will try to give some details about the seriel number system used by YAESU / Vertex. If you have any more details, please feel free to send me the informations. mny tks in advance
03D040032 for example means
YY M LL UUUU where
YY are the last year digits,
M is the month with JAN = C, FEB = D, ... (no A or B),
LL is the lot number, and
UUUU is the unit number with the lot LL.
For this example, it is Lot 04, Unit 32 and was made in February 2003