This is an Eclipse Streamline fountain pen in marbled burgundy c. early 1940s. The Eclipse Streamline appears to borrow design elements from the Eversharp Skyline clip. The 5 5/16 inch long pen is a lever filler and has no barrel imprint. Many different celluloids were used on the Streamline pen, including black, marbled colors and snakeskin colors. At least two barrel shapes are used, including this flat end with a pointed end cap and a more tapered end. The very firm gold plated stainless steel nib reads ECLIPSE over OSMIRIDIUM POINTED CANADA.