Happen to be in Zurich for a few days...swatch store right down the street...had some time to burn so stood in line (for an hour unfortunately) and picked up a Mercury. No Neptune or Moons avail; at least I was 3rd in line. Will give it a whirl. View attachment 1647004
Wittnauer Electro-Chron today. The original battery for this watch is huge by today’s standard, and is no longer available. I made a cardboard spacer to hold the modern battery. The case back actually contacts the battery and completes the circuit.