T.J.
I had the same question when I came across that series. I eventually figured it out after looking at the Scott's Catalog for awhile.
There are no n00bs in stamp collecting. Just something a newcomer hasn't come across yet. Until this thread, I'd never heard the 3147-3150 series called the 'red line' series. So we both learned something today.

Russ
I've seen a lot of helping and learning since I've joined these boards. I'm still amazed at how polite and helpful everyone is. Joining these boards is one of the best things I've done with this hobby.