Dating a marshall amplifier

20-Nov-2019 07:08

It would be more accurate to say that approx 650 of each of these models were produced in ’60.As a rule, the serial number is usually located on the back panel of the chassis but some amplifiers made between 1979 - 1980 had them on the front panel.Other things to look for include chasses placed in cabinets from a different year, “doctored” tube charts, non-original control plates (usually reproductions) on silverface amps, original transformer bell ends (they have correct date codes, of course) on non-original transformers, and non-original knobs (either repro or silverface knobs on blackface amps).unusual things can be found such as the empty “Pulse Adjust” hole on the rear of early ’60 brown amps, the “middle” volume control, use of tweed style grill cloth, strange non-documented transitional circuits, and changes in tolex color including the super-rare cream colored “brown” tolex that is found on some late ’60 amps. Given that people may refer to this information seeking specific production quantities of amps they are curious about, it should be pointed out that the serial numbers apply to chassis types, and not specifically to amplifier models.

Instead, there were approximately 2000 of these chasses produced, which then ended up as one of the three models in question.(c) Manufacture date - The last character determines the date of manufacture.Since A was used in both 19, Marshall decided that 1971 would start with C.Some things are very obvious such as non-original or reconed speakers, non-original transformers, replaced pots, re-tweed, re-tolex, re-grill, etc.and these changes are often disclosed and of a non-malicious nature.

Instead, there were approximately 2000 of these chasses produced, which then ended up as one of the three models in question.

(c) Manufacture date - The last character determines the date of manufacture.

Since A was used in both 19, Marshall decided that 1971 would start with C.

Some things are very obvious such as non-original or reconed speakers, non-original transformers, replaced pots, re-tweed, re-tolex, re-grill, etc.

and these changes are often disclosed and of a non-malicious nature.

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