Original 1976 Houston business trade magazine vintage ad for CAPITAL NATIONAL BANK.  Main office was located at 1300 Main at Polk streets, Houston, Texas.  It Owes You $4,675.22. Your checks are delivered, sorted, stamped, routed, verified, entered in the books and sent to the bank for deposit and collection. The Lock Box Plan. Capital picks up your checks at your special Post Office lock box, verifies checks against statements and forwards them for collection. ​This old one page financial magazine advertisement would display beautifully matted and framed.