STP5-15 Movement: Functions, History, and Interesting Facts

The STP5-15 is an automatic mechanical chronograph caliber produced by the Italian company STP (Swiss Technology Production), a subsidiary of Fossil. This movement represents a modern and competitive solution for mid-range chronographs, offering reliability, accuracy, and a wide range of functions.

History

STP was founded in 2012 with the goal of producing their own mechanical movements using Swiss technology. The STP5-15 caliber is one of their key chronograph movements and a competitor to traditional calibers like the ETA Valjoux 7750. STP aims to offer quality and affordable solutions for watch manufacturers seeking modern and robust mechanisms.

Functions and Technical Specifications

• Automatic mechanical chronograph with stopwatch and date functions.

• Frequency of 28,800 vibrations per hour (4 Hz) for smooth seconds hand motion.

• Power reserve of approximately 44 hours.

• Displays hours, minutes, chronograph seconds, 30-minute and 12-hour chronograph counters.

• Date window with quickset feature.

• Movement diameter about 30 mm, height about 7.9 mm.

• 26 jewels to reduce friction and extend durability.

• Manual winding possible via crown.

• Design focused on reliability and ease of maintenance.

Interesting Facts

• The STP5-15 is often chosen by watch manufacturers wanting to offer quality mechanical chronographs at an affordable price.

• The movement has similar dimensions and technical specifications to the ETA Valjoux 7750, facilitating its use in a wide range of watches.

• Thanks to modern manufacturing, it offers reliability and accuracy that meet current watchmaking standards.

• STP emphasizes compatibility with common components and easy serviceability.

• This caliber is suitable for anyone seeking a robust and precise chronograph mechanism with good power reserve.

Summary

The STP5-15 is a modern and reliable automatic chronograph caliber offering excellent value for money. It is ideal for watch manufacturers and customers who want a quality chronograph with high accuracy, durability, and ease of use.

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