This is a Sheaffer Snorkel Admiral in Pastel Blue c. 1952-1959. Pastel Blue was one of the original Snorkel colors introduced in 1952. The Admiral has an open 14 karat gold nib, plastic cap and barrel, gold-filled clip stamped "SHEAFFER'S", and 1/4" wide gold-filled cap band. Colors produced were black, burgundy, pastel gray, pastel blue (or aqua), pastel green, buckskin tan, vermilion (a tangerine), and sage green. The Snorkel Admiral pen sold for US $10.00 in 1955 and with a matching pencil, $16.00. This Admiral has a Shorthand nib. Note the marking on the section.