This is an Indian fountain pen / pencil combo in yellow c. 1930s, possibly made by the Arnold Fountain Pen Company of Petersburg, Virginia. They came in two lengths, with two clip types, and two trim colors, either silver (probably chrome or rhodium plate) or gold plate. Nibs were stainless steel, sometimes gold plated. The celluloid cap and barrel is made of a multicolored pattern that emulates Navajo Eye Dazzler fabrics, and was made in red, blue, green or yellow versions. The length of the pen appears to be related primarily to the pencil unit installed, as all pens appear to have the same fountain pen front end, cap size and cap threading. The pencil unit is distinguished by either three or four engraved grip rings, with the unit having four being on the longer writing instrument. They will therefore measure 5 3/8 inches or 5 5/16 inches with the cap on. Clips are stamped INDIAN and are either plain faced with a ball end or will have an elongated, raised triangle design with a flat ball end. Trim plating was lightly applied and either gold or rhodium/chrome.