How can I find out when my Bassman head was made? The serial number on the metal chassis is F121937. I can't find any other serial number. So when was it made?

http://www.ampwares.com/ffg/ Bassman 135 (77-83) Some time between 1977 and 1983. If you can find some EIA numbers on the transformers or potentiometers you can probably date it more precisely, but it really doesn't make that big of a difference. Late 1970's or early 80's is all you really need to know. Chris

On the endbells of the power or output transformer or the power supply choke, you'll see a number that will probably look like 606 YYWW (where the YY and WW are numbers). The 606 means Schumacher Electric Co., the next two digits should be the last two digits of the year (77 - 83 I suppose) and the last two will be the week (01 - 52). If the numbers on the three iron core components are close to one another, you know that the amp was made sometime after that. Like Throbbinut mentioned, controls will be date coded too as will the big electrolytic caps under the can. If you look under there...DON'T TOUCH ANYTHING METAL!!!!

DATING TABLES For mid to late '70s silverface amps and early '80s "blackface" models, the serial numbers are date encoded much the same way as Fender guitars from the late '70s: A6 + 5-digits - 1976 A7 + 5-digits - 1977 A8 + 5-digits - 1978 A9 + 5-digits - 1979 B + 5-digits - 1975, 1976 F0 + 5-digits - 1980 F1 + 5-digits - 1981 F2 + 5-digits - 1982 F3 + 5-digits - 1983 F4 + 5-digits - 1984 F9 + 5-digits - 1979, 1980 http://www.tcguitar.com/pages/fendamp5.htm

The serial on the chassis is A01456. Can't find the year. It's a Fender Bassman 100 (silverface). Can anyone help me? Thanks!

when dating, i'd recommend taking it to dinner and a movie before turning it on. ..................but seriously, the filter caps, transformers and pots will have date codes that will give you a very close approximation as to when it was made.