History of marshall amplifier book

[dern]

Has anyone got a copy of this book and if they have would you mind having a look in it to see if an old amp of mine is detailed in it please?

It's a 1979 Park Lead 50W identical the one sold in this auction...

http://cgi.ebay.co.uk/Park-Lead-50-Watt-1x12-combo...

If there's any detail in the book I'll order a copy but if it isn't in it (or it just says they released a combo in 1979 called the... well, you get the idea) I'll not bother.

Thanks,

Mark