OMAS ARCO BRONZE - Limited edition

Omas pens in arco bronze celluloid are nowadays among the most desirable and sought after modern pens ever.
This pen is a rare Omas piston filler with roller clip in arco bronze celluloid which was part of a limited edition of only 75 pieces.
The engraving on the cap reads 57/75. I do not know who commissioned this limited edition, it may have been a pen shop like Novelli or a limited edition commissioned for a special event.
The pen is pre-owned but in pristine condition, with no signs of use at all.
It comes with a standard Omas box.
Nib is EF.