MONTEGRAPPA 1912 SIMPHONY light blue

Montegrappa Symphoni in light blue celluloid.
The pen is unused and comes with its complete packaging, including a brand new original converter.
Beautiful two-tone Montegrappa nib with greek key decoration.
The pen has a silver finish: cap band, clip, barrel end and grip are in silver metal.
I expect it to be silver but there are no hallmarks.