You're right about one thing, you
have lost it. The dog analogy proves that. You have gotten a fair amount of attention, now you should feel better.

ENOUGH. Cletis & BBSD are correct -- Only the '55's are differentiated 1st and 2nd series. 2nd series '55 through '59 are called the "Task Force" for the Chevies. If vendors are calling it any other way, they are incorrect -- again, as Cletis has accurately stated.
Let's get back to answering the OP's real question and quit barking at ants/agitating.
John