Vintage Accutron Watchmaster test set, model 600, a specialized tool used by watchmakers for testing and servicing Accutron tuning fork movements.
A desirable piece for collectors, horology enthusiasts, or professional watch repair.
Case measures approximately 5 1/2" wide, 7" tall and 3" deep. This item was not tested by us. The back has had a foam pad either on the unit or in the box that is crumbling from age.