In 1948 Omas introduced the Extra 55X line which comprised ogiva and facetted shaped piston fillers in three sizes: 555 (lady), 556(senior) and 557 ( oversize).
The "S" suffix was used for cylindrical pens ( S: Semplice), while facetted pens were identified with the "F" suffix ( F: Facetted).
Colors were black, gray pearl and tortoise brown.
The Extra 556/s was one of the most successful models ever. It was the perfect pen, slender and light to use; it could perfectly fit female and small male hands.
This Omas Extra 556/S set is in pristine condition and probably it has ver been inked. It is fitted with a very pleasant EF nib and comes with its original presentation box the complete paperwork.