And finally the second from left:
"The 2N3055 is a silicon NPN Power Transistor intended for general purpose applications. It was introduced in the early 1960s using a hometaxial power transistor process, transitioned to an epitaxial base in the mid-1970s.
2N3055 is also used in audio power amplifiers. The device has good amplifying factor and also the gain is almost linear making 2N3055 one of best solution for power amplifiers..."
Now all this doesn't really answer what grade these could go as. The only similar thing I could find is
here but Lost calls it a capacitor. And I feel like the
link in that thread could be useful but I'm really not sure.
Hopefully all this info can help you or help someone help you more than me. D: