Opera is not round as is any other pen, and it's not square, which would make it un-ergonomic, and it's not octagonal either. It is simply unique.
Oversize version of black Opera; same Guillochè etched black resin, with rhodium plated trims, and same 23 Kt palladium nib, F, M, B.
The large, wood box includes a precious crystal inkwell of the same square-rounded shape.
All the Opera pens can be personalized with initials on the cap top, with magnetic initials of Visconti's My Pen System.