This is a Wahl Model 329AW Ripple Design 12 karat gold filled ringtop fountain pen c1922-1924. It is the shortest fountain pen, at 3 9/16 inches, with the engine turned Ripple design, a repeating pattern of straight lines with a small curve out that creates a ripple effect around the cap and barrel. Introduced on pencils in 1921 and pens in 1922 and continues through the 1925 catalog. The barrel has a rectangular blank for engraving in one of the panels. It features a Number 2 14 karat gold nib stamped Wahl. It sold for $6.00. Model 329 also came in a choice of sterling silver for $6.00 and 14 karat green gold fill for $7.00. Matching Eversharp pencils were available for $4.00, $5.00, and $6.00, respectively.