There was a Russell's in Long Beach in the 1950's. Famous for their hamburgers. Is this the same Russell's?

No, this was a hotel in Pasadena that burned down called Russell's, and this was just a restaurant portion that survived the fire.

Yes

You should try the Pasadena location if you haven't yet. They have many more great items on the menu than good burgers.

Yes it is... Bixby Knolls on Atlantic was the Original. .