The Nera watch originates from a declassified abandoned Tornek-Rayville tribute project gone rogue.

The Tornek Rayville TR-900 diver’s watch from the 60's is one of the rarest diver’s watch ever made.
It was made by Blancpain for the US Navy’s Experimental Diving Unit for use by its Underwater Demolition Team divers, a unit that would later become known as the Navy SEAL’s. Only around 1,000 pieces were made, and most were subsequently destroyed because the watch was using a radioactive element. On the caseback there is a radioactivity warning sign followed by the instruction: "If Found, Return to Nearest Military Facility." Only 30 or less watches are still existing today.

Despite the TR-900 memorial watch overhaul, the result: perenwatches.com/nerarogue is a distinctive hand built Swiss watch with unique features. The fluted conical rotating bezel is a singularity in the watchmaking industry offering supreme grip and maneuverability while the automatic, in-house regulated movement provides reliability in extreme conditions and up to 200m/660ft under water.

With thanks to:

Yvan Zbinden - navrim.ch
Dario Ratti - drhorloger.ch
Tristan Triponez - atomic-cafe.ch