32 Working Turning Technologies E-Instruction Pulse Model KG3E1 With Case

Description

32 Working Turning Technologies E-Instruction Pulse Model KG3E1 With Case.  I have no idea what I have here.  I bought these at auction and figured anything that has electronic purposes has to be useful to someone.  There used to be 33 in the case, but there are only 32.  I can't image that makes any difference.  They all have AFROTC on them, which I am pretty sure stands for Air Force Reserve Officers' Training Corps.  So I am guessing they were used in some type of training or educational situation.  They all work.  If you know more about these, feel free to shoot me an update.  Thanks