I need help with identifying my 26" cruiser, no ID markings, I built it 25 years ago and could be 15+ years older than that.. TIA Bottom bracket and rear brake (click for larger):


Bike frame and chainring (click for larger):


head tube (click for larger):
The frame looks like a 1979 S&amp;S Newport
S&amp;S is the manufacturer.
Newport is the model  

It's amazing how many frames similar to this were made from the late 70s to the late 80s (and even some in the 2000s)

1979 S&amp;S Newport from the BMX Museum


Another bike, same frame, different angle, also from the BMX Museum


Frame only rear shot
  

The key frame features are:  


Slightly "notchy" bend in the top tube. Later years(Newport was made until 1983 based on what's posted at the BMX Museum) seem to have a smoother bend on the top tube.
Two piece rear end
Brake mount made of tubing (not flat steel)
Flat steel chain stay brace just behind the bottom bracket.
Straight "3rd tube" brace tube below the top tube.