Is it a 50w combo or just head?There are some expensive caps in there. Those Auricaps and Musicaps go for 12-15 bucks a pop, depending on the capacitor value! There's a used 50 watt over on the Steel Guitar Forum for $1300. Seems like a pretty good price as they list at $3K!
It's a head. It's the VG....Vince Gill 50 watt head.
Looking on the Little Walter website. It says that Paul uses a Twin series amp head. Th head has 2-50 watt chassis in one head, a different tone stack than The VG(Vince Gill) model.
Here's the VG: