Mystery Swiss Nautical Watch — Dual Ronda Movements, Tide + Moon Phase, Two Crowns — Help Identifying Maker

Hi all, hoping the collective knowledge here can help me identify the maker of this unusual Swiss nautical watch.

What I know:

• Swiss Made (stamped on case back)
• Stainless steel case back, black-coated metal case
• Genuine leather strap
• Two completely independent Ronda SA quartz movements in a custom dual-movement chassis
• Right crown / right movement: Ronda 778 — drives main dial (hours, minutes, moon phase, date)
• Left crown / left movement: Ronda…

Mystery Swiss Nautical Watch — Dual Ronda Movements, Tide + Moon Phase, Two Crowns — Help Identifying Maker