Hi! I have a Marshall JTM Super PA 100w Serial No - 20186

that I'd like to find out more about. What is this amp called ie, is it a JTM 45/100 or?

Alo the 4 x 12' cab is a basket weave serial number - 8266. What speakers would be in this cab?

I'm finding it difficult to find definitive information and photos are often very similiar but subtly different.

Thanks for your help!