This is a Sheaffer Snorkel Clipper in Mandarin Orange c. 1957-1959. Mandarin Orange was one of the new Snorkel colors introduced in 1957 and pens of this color do not have matching color sections, but black, as shown. The Clipper has a Triumph palladium-silver alloy nib (may be hallmarked PdAg), a polished stainless steel cap and plastic barrel, a gold-filled clip and cap band. Colors produced were black, burgundy, pastel gray, pastel blue (or aqua), pastel green, peacock blue, buckskin tan, mandarin orange, fiesta red, and sage green. This 5 1/2 inch long Snorkel Clipper has a fine nib and sold for $18.50 and the matching pencil, $7.50.