Pittsburgh, Pennsylvania. $10 1902 Red Seal. Fr. 613. The Commercial NB. Charter #2711. PMG Very Fine 20.A desirable red seal note and also on a very scarce Pittsburgh bank. The Commercial National Bank of Pittsburgh is known by just a scant 11 large-size notes with the entire population being either these 1902 red seals or series of 1875 notes. Mostly faded signatures are observed but the note is otherwise free from distractions for the assigned grade.