I have owned a Zenith watch for over 45 years and now realise I know absolutely nothing about it, other than where I bought it. It has spent the last thirty years in a draw (long story) but having been rescued it runs well but gains a little. The back has never been off as itís never had any issues. Can anyone throw any light on itís history please, as Iím wondering if it is worth having it serviced and probably a new glass.
The number on the back is 959 D 335.