Heritage Watch Manufactory Tensus

The Tensus four hands by Swiss watch maker Heritage Watch Manufactory is an absolutely precise timepiece.

With more than 300 individual parts, winding reserve indicator, a precision balance, special twin mainspring barrels and a triple escape mechanism with dual escape wheel and constant power, it is a true masterpiece of the art of horology.

The Tensus is the perfect watch for everyone who is not only captivated by the intricate mechanisms; it is also, with its exquisite embellishments, an exclusive understatement.

Technical details

Functions
4-hand watch (including power reserve)
Hours / minutes / small seconds (at 6 o’clock),
Power reserve (at 9 o’clock)

Movement
Independent manufacture Calibre: Cal. 880
5 patents pending
Fully hardened parts
100 % Swiss Made

Case
Designed by Eric Giroud
Variants: (a) Polished / satinised steel (b) White gold or red gold
Water resistance: 50 m
Length over strap-holding bridges: 53.10 mm
Casing diameter: 42.50 mm
Casing height, total: 13.95 mm
Casing height, without crystal: 11.20 mm
Crystal: Domed sapphire glass
Casing back crystal: Flat sapphire glass

Dial
Designed by Eric Giroud
Shock resistance: Dial positioned by means of pins, screwed directly onto the movement
Dial Variants: (a) Brass, with brass applications / tracery: blue (steel casing) (b) Gold, with gold applications / tracery: anthracite (gold casing)
Hands: Hardened steel
Bracelet: Leather / alligator, with pin buckle
Bracelet size: Strap-holding bridge: 22 mm / buckle: 20 mm

Movement Specifications
Calibre Nº: HWM Cal. 880
Diameter: 38.30 mm
Height: 7.00 mm
Jewels: 55
Escapement type: Sequax triple anchor escapement with double escape wheel and constant power / patent pending; capillary phase to improve oil retention
Balance: Mass-regulated Vivax balance / 16 mm / patent pending
Balance spring: Over-coil hairspring (Breguet)
Fine regulation: Tenere fine adjustment / patent pending
Mainspring barrel: Pariter twin mainspring barrel / patent pending
Semi-oscillations: 18 000 / h
Mainspring barrel diameter: 17.40 mm
Moment of inertia: 126 mgmm²

Gear train
Gear tooth system: Cycloid gear teeth
Pinions: Fully hardened steel pinions
Gears: Copper beryllium
Mainspring barrel: Copper beryllium
Screws: Steel, blued and polished
Power reserve: 60 h

Decoration
Movement plates: hand bevelled

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