I am sure this has been asked many times on this forum but I've recently purchased a plexi jmp50 and 8x10 cabinet. Can anyone venture a guess as to the date of this plexi and cabinet? I am not sure if it's a late '67, '68 or an early '69. I think the cabinet is a '68? It has a gold logo. Anyone?? As you can see the amp needs to be cleaned up a bit to get rid of the surface dirt but it's supposed to be all or mostly original. It's been sitting in my buddy's basement for at least 20 years and he may have had it longer. But the cool thing is that it was the first Marshall I ever played and I am pretty psyched I was able to get it. Anyway any help dating it would be appreciated!!