You've made out ok there Wez, those EL34s look like old Siemens ones - great midrange crunch and spit, snarly as fook :D
The smoothing caps are the originals, but it's tough to see what kind of shape they're in. My thoughts are that on a 40+ year old amp, it makes sense to replace all the filter caps. Also do the bias cap while you're at it.
Looks nice and clean inside too, makes a change for Selmers which are normally woefully looked after.