Marshall 1987x 50 watt head

At 11:07 in this video Paul Gilbert says that he used a Marshall 1987x amp for the recording of 'Vibrato'.

"Taking a look at the other amps in his repertoire – such as a ’59 Fender Bassman Reissue, a Fender Vibro-King 60 watt combo, a ’69 Marshall JMP50 Plexi head and a Marshall 1987X Vintage Series 50 watt tube head, among others..." states [this article](http://www.proaudioland.com/news/tom-petty-and-the-heartbreakers-feature/), by Pro Audio Land, about Tom Petty's gear.

"I also have a...1969 50 Watt Marshall "guitar head".

On Steve Hackett's [official website](http://www.hackettsongs.com/instrument.html), he lists Marshall 1987x 50 heads among his amplifiers.

In this photo, the Marshall 1987X amplifier head can be seen on the left side of the photo.

https://www.youtube.com/watch?v=VE2d5OJSq18&t=

https://www.youtube.com/watch?v=ecHgF2h4hnw