Marshall dating serial number two blind fish dating
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.
I remember two 'suits' from upstairs standing behind me occasionally doing time studies.
1969-1992 Marshall used a coding system that provided (a) model, (b) serial number, and (c) manufacture date.
This sequence of (a)(b)(c) began in 1969 and was valid through 1983.
They actually held clipboards and stopwatches to measure how long it took for me to attach various parts.
Of course I tended to hurry more when they were there, and I would fumble more, too.” Another really interesting fact was that he recalled that the eyelet boards were loaded/wired/soldered in Mexico!
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Clearly Fender wasn’t afraid to use incorrect parts when they were in a bind. The 5G12 Concert is the earliest version from very late 1959 and early 1960 so the existence of a tweed example, while extremely rare, is certainly plausible since Fender was making lots of tweed amps during the same time period.