1984 JMP?!

[Mats A]

There is a 1984 JMP 50W redone in white vinyl for sale here. The seller says it has the letter R and that this means 1984. But as far as i know R stands for 1983. There must be something that is not correct since Matshall started making the JCM 800 look in 1981. As far as i know there was still some years before they made their first Reissue of that amp.

[burnsy]

Definitely agree with you on the 'R' in the serial no. for 1983. Michael Doyle's book confirms.
I suppose an amp could sit in a store for a while and be sold in 1984 with an 83 serial no.?

[Mats A]

The amp gets it's serial number when it's made. Not sold.

[burnsy]

Sorry Mats, that's what I meant. Made in 83 and given an 83 serial no. and then sat on a store's shelf till 84 when it is bought and a customer is given a 1984 dated reciept.

[Mats A]

He bought it used. There is no JMPs after 1981. They became JCM 800. You can't fit a JCM 800 chassis in a JMP box because of the different placing of the Power and Standby switches.

[Mullard2203]

The letters in the serial skipped a letter in the sequence at one point too.

Ive seen 1983' JMP's before.

Not sure what your situation is tho ...

[Mats A]

You mean they made 2204 amps looking like JMP's in 1983? As they were making the JCM 800 series? They have skipped more than one letter.

[Mullard2203]

http://www.bluebookofguitarvalues.com/G ... AMPLIFIERS

[Mats A]

The letter R stands for 1983 that is certain. According to the seller the guy he bought it from said it was a 1980. But this seller says it has the letter R. But Marshall changed the look to the JCM 800 Series in 1981 so why make smaller panel JMP amps in 1983?