This is a Victapen Convertible tiny pen and pencil set in rust marble c. 1933-1936. Victapen was a brand sold by the U. S. Victor Fountain Pen Company of New York, New York. This 4 inch long pen set was sold by mail order for $1.00 plus ten cents postage, including a personalized leather pen case. Advertised as a men's vest pocket or ladies pen set, the pen's end cap and pencil's clip top could be unscrewed and the pen and pencil could be reassembled into a 5 1/2 inch long pen and pencil combo. The pen is a bulb filler with a breather tube, activated by removing the blind cap and squeezing the exposed in sac to fill. This system was patented on July 18, 1933 by Edward Hugetz, an inventor responsible for several of the company's designs. These small pens came in a variety of celluloids, including stripes similar to the Conklin Glider, marbled colors, and dashed stripes. At least three clip designs are observed.