The Nera watch design originated from an abandoned Tornek-Rayville homage project. The homage project was transformed into what soon would become the DNA of the Peren brand.

The Tornek Rayville TR-900 diver 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.



316L Stainless Steel case with three-tone execution. The base is sandblasted while the top is matte and brushed. Display caseback.



Metalic dial with embossed applied markers and conical inner bezel. BGW9 Super Luminova on hands and dial. Unique Nera blue/green color.



Unique conical rotating bezel coated in Black PVD. knurled surface. Laser engraved markers on the outer bezel. Scratch resistant Sapphire Crystal.

Perren Rough

  • Swiss Made

    Diameter: 39mm

    Height: 13.50mm

    Case: Three tone 316L Stainless Steel

    Bezel: Black PVD coated, conical knurled

    Functions: Rotating unidirectional

    Crown: Screw-down

    Caseback: Display back

    Movement: Automatic ETA 2824/ Sellita SW200

    Power reserve: 40 Hours

    Crystal: Scratch resistant domed Sapphire

    Dial: Metal with applied indexes, Nera blue

    Hands: Brass, white

    Lume: BGW9 Superluminova, dial/hands/case

    Strap: NATO Leather/Nylon, steel buckle

    Water resistance: 200m/600ft

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