Hey, y'all, first post here.
I build and repair tube amps, so SS stuff is kind of a mystery to me. In spite of that, I took in a Marshall 2199 Master Lead Combo (30 watt, 2x12) for repair. The customer has hacked off the two output transistors on the back of the chassis. The available schematics online are all rather blurry pdf scans, and I can't for the life of me make out the part numbers for the pnp and npn transistors. I suspect those part numbers would long since be obsolete anyway.

Does anyone know good substitutes for those parts? The operating voltages are +25 vdc and -25 vdc.

I need your collective wisdom, so any ideas would be great.

Thanks

Rich