Marshall valve combo serial number 603?

peawobbler · 04-28-2009, 07:06 AM

I have been the proud owner of this Marshall combo, 4 valve amp for around ten years now but still know very little about it's true age, rarity and value etc. I haven't seen any other quite like it. The serial number reads 603. Made in England. The amp is all original but the speaker has been replaced with a JBL unit at some point before i took ownership. Not sure on the wattage but i do know it's loud and still sounds great with a real crunchy blues sound. Not interested in selling it, just interested in it. Any info/feedback would be muchly appreciated. Unable to post pics for some reason will try again later

janarn · 04-28-2009, 08:37 AM

Serialnumbers don't say much about the model.
It's the prefix to the serialnumber that tells the model.

So this is a combo with 1x12" speaker, four valves all together,
and a very low serialnumber?

The Silver Jubilee series had a 1x12" combo 2554, and serial numbers
that started at 00200, but it had more than four valves.

I thought that Marshall used a four digit serial number to '66,
and started using five digit serialnumbers from '67, when they
started with their plexi back panels.

Only combo with four valves I can think of is the 20w version
of the 1974 combo, but then the serial number could be wrong.

If it has four output valves it could be a JMP 2150 combo.

Pictures?

peawobbler · 04-29-2009, 10:27 AM

Pics added. These may help! Ta

janarn · 04-29-2009, 03:36 PM

That is not a Marshall. It's a Park 100w Valve Rock Combo,
also called 1x12" 100w MV Super Combo, model 1240.

The Park amps were built by Marshall for Johnny Jones who was the
distributor of Marshall in the North of England.
When Rose-Morris took over all distribution of Marshall amps,
Jim Marshall made the Park amps exclusively for Johnny Jones from '65.

The Park amps are great amps, and they are Marshalls in disguise.
Your amp is the Park version of the Marshall 2150 combo that were relased '78.
The designer Steve Grinrod did get his original ideas released in the Park model, while the Marshall 2150 was a tamed down version of the amp.

So, this should be a great sounding amp, better than many Marshall models.
It's a very rare model, and many collectors and players would love to have one.
Take good care of that amp.
If you look at your grill cloth over the Marshall logo, you can see where the
Park block logo used to be.

peawobbler · 04-30-2009, 06:51 AM

Wow! What incredible encyclopedic knowledge you have sir! Not in a million years could i have discovered all that. It's very interesting and will certainly be useful to me in the future. A real help, Thankyou.

04-28-2009, 08:37 AM	#2 (permalink)
janarn Senior Member Join Date: Aug 2008 Posts: 498	Re: Marshall valve combo serial number 603? Serialnumbers don't say much about the model. It's the prefix to the serialnumber that tells the model. So this is a combo with 1x12" speaker, four valves all together, and a very low serialnumber? The Silver Jubilee series had a 1x12" combo 2554, and serial numbers that started at 00200, but it had more than four valves. I thought that Marshall used a four digit serial number to '66, and started using five digit serialnumbers from '67, when they started with their plexi back panels. Only combo with four valves I can think of is the 20w version of the 1974 combo, but then the serial number could be wrong. If it has four output valves it could be a JMP 2150 combo. Pictures?

04-29-2009, 10:27 AM	#3 (permalink)
peawobbler Junior Member Join Date: Apr 2009 Posts: 3	Re: Marshall valve combo serial number 603? Pics added. These may help! Ta

04-29-2009, 03:36 PM	#4 (permalink)
janarn Senior Member Join Date: Aug 2008 Posts: 498	Re: Marshall valve combo serial number 603? That is not a Marshall. It's a Park 100w Valve Rock Combo, also called 1x12" 100w MV Super Combo, model 1240. The Park amps were built by Marshall for Johnny Jones who was the distributor of Marshall in the North of England. When Rose-Morris took over all distribution of Marshall amps, Jim Marshall made the Park amps exclusively for Johnny Jones from '65. The Park amps are great amps, and they are Marshalls in disguise. Your amp is the Park version of the Marshall 2150 combo that were relased '78. The designer Steve Grinrod did get his original ideas released in the Park model, while the Marshall 2150 was a tamed down version of the amp. So, this should be a great sounding amp, better than many Marshall models. It's a very rare model, and many collectors and players would love to have one. Take good care of that amp. If you look at your grill cloth over the Marshall logo, you can see where the Park block logo used to be. Last edited by janarn; 04-30-2009 at 05:59 AM.

04-30-2009, 06:51 AM	#5 (permalink)
peawobbler Junior Member Join Date: Apr 2009 Posts: 3	Re: Marshall valve combo serial number 603? Wow! What incredible encyclopedic knowledge you have sir! Not in a million years could i have discovered all that. It's very interesting and will certainly be useful to me in the future. A real help, Thankyou.

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