Dating fender tube amps serial number Free dating lines

It’s unknown if the tweed covering was a mistake (“Oops, I thought this was a 4x10 Bassman cabinet that I was covering”) or intentional, perhaps as a special order.

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These are marked with EIA code “831” and are most prevalent during the 1966-68 time period.

Some examples include a '66 Princeton Reverb and ’66 Pro Reverb with Better Coil output transformer, a ‘66 Deluxe Reverb and ‘67 Twin Reverb with Better Coil reverb transformer, and a 1968 Vibro Champ with Better Coil trannies.

In the above example, the transformer was made in either 1966 or 1976, week 45.

Now if it’s a blackface amp, it’s a safe bet that 6 means 1966. This code can be found on the power transformer, output transformer, choke, and reverb transformer.

Up until the end of the blackface era (1967), all amps left the factory with a tube chart that had a two letter date code stamped on it.

The tube chart date code works like this: the first letter indicates the year and the second letter indicates the month.

They used a code like this: 606 – 645 The date is in the last three digits, after the 606 – .

The first of the three digits tells us the last digit of the year (unfortunately not decade specific) and the last two numbers tell us the week.

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

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