I suspect both modules were used, I have this model in both stainless steel and gold filled one of which uses uses the line segment module the other the dot display.
I also have the gold filled Hamilton you show in your photo mine also uses the dot display.
It is back to the line segment display with the model with the intergrated band.
This article will be of interest http://www.crazywatches.pl/hamilton-qed ... r-led-1975