I remember two 'suits' from upstairs standing behind me occasionally doing time studies.

They actually held clipboards and stopwatches to measure how long it took for me to attach various parts.

dating fender bassman-25

Not only that, but to meet Swedish safety codes, Hagstrm removed the external voltage selector switch (fitted to all blackface and silverface export models) and hardwired it internally (see photos).

Notice that the original Fender back panel was removed and replaced with a Hagstrm panel.

These are marked with EIA code “606” which is the company number for Schumacher.

Well, this universal “truth” was debunked when we found a bunch of amps with transformers made by the Better Coil and Transformers company.

Note the check boxes for DOM (domestic US model), EXP (export model), CSA (Canada model), STD (standard) and SPEC (special).

I have to wonder how often Fender used the SPEC check box and what features a “special” amp or cabinet would have?!

I promise the tables will still be there after you finish reading.

Okay, I know you’re all just dying to skip ahead to the serial number tables but try to contain your excitement and read through the article first.

There is some debate about how to interpret the production code information on late ‘50s to mid-1967 tube charts and Greg Huntington is still working with those.