Petri 7 top cover

Petri 7 top cover

The top cover of the Petri 7 reveals a simple molding shape that implies a “7” on the top cover, and a mysterious brass arrow that seems purely decorative. (Daniel J. Schneider)

The top cover of the Petri 7 reveals a simple molding shape that implies a “7” on the top cover, and a mysterious brass arrow that seems purely decorative. (Daniel J. Schneider)