Parker Duofold Art Deco Desk Set w Clock – Excellent Working Fountain Pen. Vintage Desk Pen with Base. Very hard to find and collectible. Parker USA — late 1920s – early 1930s. The assymeytrical base is a little over 5-1/2 long at its widest point. The pen itself is 7-1/4 in length. The pen is a button filler. You unscrew the end of the pen — the taper — and you will see the button….