This Glycine Airman SST which stands for: "Superonic Transport" is a Vietnam era pilot's watch that was produced for both U.S. pilots and civilians alike. It has some striking features, including an Supersonic jet on the back, and dial colored in black/grey to allow for quick deciphering between AM and PM times. The orange 24 hour inner rotating bezel provides a GMT function for tracking different time zones and resulted in the collector nickname "pumkin" for this model. The striking tone of orange isn't just for looks however. It just so happens that orange is one of the easiest colors for humans to decipher in low light condition, which is perfect for military and flight applications. Coming in at 41.5mm, the over sized tonneau shaped case is large for even a tool watch of this era. The addition of a quickset date feature is also welcome for practicality and allows the watch to be rotated in with other pieces easily. Between the fantastic dial/bezel preservation and sharp unpolished case, this example makes for a wonderful and addition anyone hunting a unique vintage watch with modern proportions.