My first purchase in my late teens when I was in the service. Citizen 7878 an eco-drive before it was eco-drive it was solar tech. Never serviced or polished. This thing is solid until the battery/ capacitor failed. Just in my collection. Maby one day ill have it serviced.
Friends tell me this is a hard to find model these days. I dont know anything the current desirability about this model. Had it so long just can't part with it now.