Help With Year Of Manufacture: Marshall 5212

[dsn716]

Probably been asked a million times already...
Where can I go to determine the year of manufacture based on the serial number?
I have an old JCM800 era Marshall Fifty Split Channel Reverb combo, model 5212. No indication of year of manufacture anywhere inside the chassis. Seral number is T04102.
Thanks.

 

[wakjob]

'T' could mean 1985...

There also should be an inspection sticker inside the chassis somewhere that might have the date on it.

 

[dsn716]

Thanks wakjob. From the limited information that I was able to find, the T in the beginning of the serial number indicates a 50 watt model. There is an inspection sticker on the inside, but unfortunately, no date.

 

[Marshallhead]

T is 1985.