Omas - Extra 630 - Fountain pen

Vintage Omas Extra 630 demonstrator fountain pen.
Hood, section, and tip in grayish tones tending toward violet on a transparent body with gold-colored finishes. The hood band features the characteristic Greek key motif.
Gold-plated nib, size F.
Used but well preserved, with slight signs of wear consistent with age; the shaft is slightly yellowed, with only a few light scratches.
Piston loading system functioning properly.
Measures about 13 cm with the hood on.
The box is in acceptable condition for its age and has a stain on the lining.
Equipped with Omas violet ink, used only for testing.