Aero optics (bubble effects) was introduced in 1929 and was short lived. The 3123 stemware line was the 3120 stemware line with aero optics applied. Aero optics were also applied to tableware. Design patent was issued to Orie J. Mosser on January 14, 1930.
The 3130 stemware line was introduced in late 1929. Two design patents were issued February 17, 1931 to Wilbur L. Orme showing this stem and a specific etching as follows: 83,412 with E746 Gloria and 83,413 with E744 Apple Blossom. The production stem has some vertical ribs not shown in the design patents.