Last night I finally managed to get a nice condition Hamilton Electronic watch that has both a early ESA Dynotron movement (9154) and a stainless steel case
I have several of the later Dynotron 9158 watches but not a early one and all my ESA Dynotrons are in gold plated cases.
It looks pretty clean and has a screw down caseback
Once I get it(hopefully Friday or Sat) I will take my own pics but for now, here is some of the seller's
If the expansion band fits me well then I am going to leave it on because it looks period and because it is a fitted(18mm) band and it is a steel case, it will not gauge the case.