HPL

I have gotten back to check on my parts for this bike and have an early SA 3 Speed shifter with the long lever and "bottom" of the bar mounting (graphics inverted, black w/silver lettering), and no indicator window. I believe this is a GC3 (GC4 for a 4 speed, GC2 made later ?) model shifter made in '48 and earlier which would help in dating this frame from the early to mid 40's if my thinking is correct. I originally thought it had a quadrant shifter, but all components seem to be of like vintage, original cable stop, etc. Later shifters I have seen have a shorter lever and have different graphics; black or red lettering on silver background, or 3/4 speed models with silver lettering and black ground (similar to mine but used for 4 speed also, no indicator window). If someone has a definite range of years for this particular shifter please inform me. Thanks all!