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Vintage 1965 Marshall JTM45 MKII PA Block Logo KT66 Amplifier


In stock


We buy your vintage instruments for cash. Get in touch to find out more.

Vintage 1965 Marshall JTM45 MKII PA Gold Block Logo KT66 Valve Head Amplifier

Vintage 1965 Marshall JTM45 MKII PA Gold Block Logo KT66 Valve Head Amplifier

One of the rarest amplifiers on the market today! This original 1965 ‘Block Logo’ has caught our attention since we acquired it. A real players amplifiers, yet still retaining the majority of the original features – detailed below.

Gold Block Logo. Green Levant Tolex. White Back Panel. Gold Plexi Front Panel. KT66 Valves. B4 Cap Dates. Selectors on Transformers – just a few things that date this to early to mid 1965! Ships with the custom high-end flight case pictured!

Serial Number: 1522

Valve Brands: GEC (KT66s), Marconi (Rectifier) & RCA/Rogers (Pre-Amps)

Transformers: Original (see below)

Voltage Selector: Yes – on Transformers

This amplifier has been serviced to a playable & safe standard, by one of our leading amp techs. To find out more about what our service includes, please check out our terms and conditions before purchasing.


Overall very good condition. The original tolex has clearly been painted (except the back panel), but it looks water based paint so could easily be stripped back with a bit of TLC. We personally love the story it tells as it is! The front panel has an extra hole drilled, and the back has four extras, that we have filled and plugged as best possible. There is no sign of why these were drilled, so we can only speculate! The cabinet has been drilled for a script logo a long, long time ago. Again, we can only speculate that this was because of the growing trend in script logos coming into fashion, leaving owners of the block logos to drill a script logo to fit in with the latest amplifiers.

Please have a close look at the high resolution photographs below, as these form part of our description.


This came to us as a bit of a project. The choke had been changed, but we acquired an original period correct choke which was fitted to the chassis. Although this is the choke that would have originally been in this head, it isn’t 100% original to this particular amplifier itself. The block logo is period correct but, like the choke, is a correct replacement and not 100% original to this amplifier. When we got this amplifier in the store, it had a reissue backboard on it. Fortunately, we were able to source an original backboard to this amplifier, which is the one on the amplifier now. Again, although original, it isn’t original to this particular amplifier, hence why the tolex on that hasn’t been painted, and the rest of the amplifier has.

One of the four input jack sockets has been replaced with a period correct. The standby lamp is non original, but a very old replacement. Two of the feet have been changed in the past, and the Bulgin has been changed to a modern IEC socket which fits straight into the hole, meaning no extra holes needed to be drilled. As you can see, although original, this amplifier has been worked on to bring it back to spec and originality. Regardless of your stance towards these old Marshall’s originality, it is a truly wonderful piece of history. We love it!

At The Music Locker we will do all we can for you to get the instrument you want. You’re more than welcome to come and have a play on this, coupled with one of our vintage guitars!

Additional Information

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In Stock

For more information on shipping prices, please visit our shipping page.

The Music Locker prides itself on offering vintage and collectable pre-owned instruments and equipment (the Products).

We take all reasonable steps to ensure the equipment has been inspected by a competent person in the UK to ensure it complies with UK safety standards. This may mean it does not comply with the current standards in the country in which it will be subsequently used. It is the purchasers’ responsibility to ensure it is inspected by a competent person knowledgeable with the relevant electrical safety standards within that country, prior to connecting to any live electrical circuit.

It is the philosophy of The Music Locker to keep all items as original as possible, only changing original components when absolutely necessary. This includes valves, capacitors, transformers, potentiometers, frets, etc. This gives the buyer the option of tailoring to their exact needs, and may mean that the item is not operating at optimum performance levels. Therefore, your personal preference may differ, depending on your circumstances (i.e. collector or musician), and you may decide to service the item in more depth upon receiving.

The Music Locker cannot accept responsibility for any costs of refurbishment to a standard different to the one advertised.