This is one of the smallest tuning fork movements and is usually found in ladies watches. The normal tuning fork "cups" are gone from this movement and instead a single coil is placed between the magnetic ends of both of the tuning fork tines --- rather similar to the Omega Megasonic 720 Hz movement.

Bulova Accutron 100 Ladies Cal 2303

Bulova Accutron 100 Ladies Cal 2303

Bulova Accutron 100 Ladies Cal 2303

Bulova Accutron 100 Ladies Cal 2303