I've posted this on the TH forum and bizarrely, no-one seems to know.
So i'm trying here, in the hope that someone's used a B1 and one of these Tags or something with the ETA E20.321 perhaps.
These are the Analog-digital variants, and I'd like to know how they function. Does the Seconds Hand stop when you use the backlight or turn the Crown, and then catch up (like on a Breitling B1) ?
Any similarities with the Omega X33 ?