vintage TISSOT Tissonic watch for spare or repair very clean watch

Vintage tissot tissonic electronic watch using bulova accutron movement. The watch is not working I do not know why. may be an easy fix? The dial is near mint, just the glass of the watch is scuffed a little. The stainless steel case and back is good. the watch sets hands as should and the quick set date still functions normally. The watch measures approx 36mm wide excluding signed winding button size. These watches are rare and this watch would be mint with a little clean of the case and new glass or the old one polished