First picture (the outside one)? Not 100% sure but from the control layout it looks like an SVT-200T, the version with the blue stripe under the controls (there was a version of this amp with white 'boxes' around each control section). 200W transistor amp.
Yup that's it for sure. Makes sense with the wattage - 200W at 8 ohms, more at 4 ohms. I haven't had a look inside but it had a huge sound, and weighs as much as my motorcycle!