[TenTec] Serial numbers

[Ken Brown]

I have read a description of Ten-Tec serial number decoding, here on the 
reflector. I have a radio that has a serial number that is not in the 
format that is described there. Maybe this is from an earlier serial 
number system. The serial number is the three digit model number, 
followed by a hyphen and five numerals. There are no non-numeric 
characters (except for the hyphen) in the serial number. Does anyone 
know how to determine the manufacture date from this format serial number?

Thanks,

DE N6KB