One of the last branches of the Electric / Electronic family tree that I don't have an example of is the transistorized balance wheel movement, where there are no contacts and instead a feedback current created from the balance wheel lets the movement know when to energize the coil.
I'm between going for an ESA 9154 (Dynotron) movement and a Seiko 0703 (Elnix) movement. Both work on the same principles, hack, and have a fine regulator for the balance wheel.
The Citizen Cosmotrons tend to be out of my price range, and I don't know the Caravelles that use the same movement well enough to spot a good one.
Anyone have experience with the Dynotron and/or the Elnix?
Links to Electric-Watches for Reference:
Transistorised Movements with Balance Wheel - Electric Watches
Seiko - Electric Watches