Then put 198 in front of it if it's in the range 4-9 and 199 otherwise.
Subtract 2 from this number and add 10 if it's negative. But it's not just the last digit of the year, and it's not the year of the Showa era, it's derived from the Western year numbers. Did I get one of the first ones made, and will I have a long list of updates to apply? I searched the internet (which occasionally contains valid information), looked at the date codes on the PA's transistors, and read the SNs referenced in Kenwood service bulletins and compared the SNs referenced to the date on the bulletin. I researched this recently having acquired a TS-940S with an SN that starts with two zeroes.
