Hamilton was no longer an American watch brand as it had moved to Switzerland in 1969 and became a brand in the portfolio of SIHH (Omega, Longines, Certina etc.).  This Hamilton Electronic was in production for just a short period. The competition from Bulova (Accutron) and the quartz watches was simply too strong. 

This Hamilton Electronic is in new old stock condition and is powered by the Hamilton 703 movement, based on the ESA 9154 Dynatron. It was the first movement with a transistor powered balance.   

How about the early date models of Hamilton?