[gunny6]

My Colt Double Eagles have Series 90 on them, I thought this was the double action series, but my Colt Defender also sports the Series 90 stamp..Just what is a series 90 ???

 

[FirearmsPlus.FL]

Basically, the stuff with a unique feature designed after 90's AFAIK.
I think the pony's and pocket 9's were also.