At long last, I have in my possession an authentic Accutron 214 'tuning fork' watch
Here is a backside view showing the 214's unique caseback, with its pull-out time-setting handle (left), screw-down battery cover (right) & serial/date code (below)
In the early 1960s, a relative got 1 of the 1st Accutron Spaceviews & I can still remember the amazement of hearing the watch hum when he held it up to my ear.
Now, the question is whether to remove the dial & fit a Spaceview crystal/handset (a Spaceview is essentially an Accutron without a dial) or just overhaul & tidy it up?