Brooks Brothers Plain Blue Label

Just bought a suit off of Ebay for a crazy low price. It is a BB suit with a plain blue label on the inside of the jacket that just says Brooks Brothers and Established 1818 underneath. Does anyone know which line it is?

I guess it would Sorry :) Thanks

Thanks its a 1818 mainline BB said. I couldn't beat it for excellent condition for $15.00  plus shipping. Thanks again.

Lee