The Engineering of Permanence
Every SEMPRA timepiece is meticulously assembled and regulated by hand by our master watchmakers. This artisanal watchmaking process seeks rigorous precision, adjusted to operate within a range of -10 to +10 seconds per day. Built from high-resistance steel, these mechanical watches are not merely consumer objects, but precision instruments designed for a lifetime of durability.
The Rotor: Captures Your Energy
The journey of time in a SEMPRA timepiece begins with the rotor, an oscillating mass that comes to life through gravity and the natural movement of your wrist. Spinning freely on its axis, this automatic movement component is responsible for transforming your kinetic energy into the motive force needed for the entire mechanical system to breathe and operate with complete autonomy.
The Mainspring: Stores the Power
All that captured energy travels to the mainspring of your SEMPRA watch, a precisely coiled elastic blade inside a barrel. As it tightens, this component acts as the mechanical watch’s primary energy reservoir. Its mission is to hold the power and release it steadily and gradually, ensuring the automatic movement keeps beating and maintains its power reserve even when you are not wearing it.
The Gear Train: Transmits the Movement
The force released from the mainspring begins its path through the SEMPRA gear train, a family of interconnected wheels responsible for distributing energy throughout the mechanism. Each wheel is mathematically calculated to rotate at a specific speed, orchestrating a mechanical choreography that allows the hour, minute, and second hands of the watch to move in perfect synchrony.
The Escapement and Balance Wheel: Regulate the Heartbeat
The flow of energy in a SEMPRA watch culminates in the regulating organ, the true heart of the mechanism. The escapement halts and releases the gear train at exact intervals, while the balance wheel oscillates at a constant rhythm. This critical interaction partitions the raw energy into precise units of time, dictating the final accuracy of the mechanical caliber second by second.
The Diashock System: Protects the Machinery
To safeguard this mechanical heart—especially in SEMPRA calibers like the NH38 or YN55A—the Diashock shock-resistant system comes into play. This mechanism uses a specialized spring to suspend the balance jewels. In the event of an impact, the spring flexes, allowing the delicate pivots of the mechanical movement to shift safely instead of snapping. This kinetic absorption is the protective shield that prevents failure from drops or vibrations, ensuring the legendary workhorse reliability and lifelong durability of these steel automatic movements.