Summer equatorial and polar dials as on N-21. Pin-gnomon missing. Decorative border of repeating trefoil pattern embraces edges of hour scales and perimeter of plate. Silver lunar volvelles configured the same as on N-21, except that a piece of black cloth appears through the phase aperture.
Matériel
"Fait & Inue par Charles Bloud ADieppe" on calendar volvelle.
