I have got hold of a Little Willie, second hand, just a few days ago!
I found your post doing a Google search for any info I could get on the amp. I saw the thing in a junk shop and thought it looked a high-quality amp - I'm not disappointed, it's a real winner. (Actually I'm a bass player not a guitarist, but I can't resist a bargain!)
Any idea what they were priced at when new? I'd be very glad of anything you can tell me about the amp or the company, as there's no manual and I've come up with nothing on the Internet...
For instance, the 2 input sockets - are they active/passive or both the same?
Cheers