Dating fender cts pots

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The first three digits refer to the manufacturer, CTS.

The last four are broken up into pairs, where the first two, 78, stand for 1978 and the last two stand for the week, which is the 18th.

Large Letter Stamps: Not 100% sure what these mean, but I have a theory they were used to grade a body prior to recieving a finish. I have seen four A stamps on Natural finished bodies, and a trans-red with an A stamp. I have also seen a D, along with an A on a Sunburst body.

This is just a theory, but if only A's were put on Natural finished guitars as an example, it could help determine if a guitar is refinished.

Neck Configuration Codes: 00 = Rosewood fingerboard 01 = Rosewood fingerboard 02 = Maple fingerboard 03 = Maple fingerboard Neck & Body Stamps: WWYD Example: 0304 - Basically the same as the date portion of the nine digit neck stamp although in black ink.

In the chart below you will see the letters that coincide with the year and month of the amps manufacture.Later potentiomters used a two digit year code making the number seven digits long.In this case the fourth and fifth digits are the year and the sixth and seventh digits are the week of manufacture.Some might go by the pot codes, but those could have been stock a year or more old by the time they were put into the newly finished guitar.Or perhaps the guitar was even assembled by various parts picked up over the years and is being passed off as "All original".

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