Introduced in the late 1940's the omas extra 55x series was designed to be a real "work horse". The line comprised both ogiva cylindrical models (with the "s" suffix) and facetted models (with the "f" suffix). The ogiva model was available in three sizes (555, 556 and 557) both in celluloid and with gold filled cap, to follow the style of the world famous parker 51. Models with gold filled cap exist both with screw and with slip on cap.
Although pretty thin and light, this 556 model with slip-oncap is really sturdy and very well balanced. It is a piston filler which is perfect for everyday use. This pen is in excellent condition with no damages nor dings on the cap. The nib is f and it is extremely flexible and responsive.