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Are the wires of the right era (cloth insulation for older stuff)?If so, you can check the pot or speaker for the source-date code, and determine an approximate age from that. The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer.

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Also it's worth mentioning: Sometimes there is a space or hyphen between the manuafacturer code and the year/week code.3 digit date codes were used in the 1940's and 1950's.

Stackpole for example converted from three to four digit date codes in late 1959.4 digit date codes were used in the 1960's and later (this makes determining the year much simplier! Here are the most common pot manufacturers (the first 3 digits of the source-date code):106 = Allen-Bradley134 = Centra Lab137 = CTS (Chicago Telephone Supply, pots and speakers)140 = Clarostat304 = Stackpole381 = Bourns Networks615 = IRC (International Resistive Company) - see Vintage Fender Products.

And remember, even the dates indicated by the pots aren't that exact.

For example, if you buy a brand new CTS pot today, they are dated a month or two in advance!

)On 3 digit date codes, you have to "guess" the decade of the pot or speaker. During the 1950's, Fender used mostly Stackpole (#304) pots.

Then in roughly early 1963, they changed to CTS (#137) pots.

In 1967 (after CBS bought Fender), Fender bought a HUGE supply of pots from CTS. So guitars and amps made as late as 1973 can still have 1967 date codes from this huge 1967 stocking.

All during Fender's life as an amplifier maker, then used speakers made by Jensen (#220), CTS (#137), Oxford (#465), Utah (#328) and Altec-Lansing (#391).

Till about 1961, Jensen was the only Fender speaker supplier.

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