Mechanical Stop Watch Sports Chronograph Running Timer
Product Overview
The SXJ504 Mechanical Stop Watch is a precision handheld chronograph designed for athletes, coaches, fitness enthusiasts, and anyone requiring accurate manual timing. Built with a fully mechanical movement, this stopwatch delivers reliable performance without the need for batteries or digital components. Its rugged construction and classic design make it ideal for track and field events, interval training, swimming, and other sports where precise timing matters. Whether you’re timing sprints, workouts, or competitive events, this stopwatch offers dependable functionality in a compact, easy-to-use format.
Key Features
- Fully Mechanical Movement – Operates without batteries, using a stainless steel spring, nickel base alloy hairspring, and a single metal light balance wheel for consistent timekeeping.
- 13-Jewel Mechanism – Equipped with 13 synthetic rubies (jewels) to reduce friction and enhance durability, ensuring smooth operation over extended use.
- Anchor Vertical Mechanism – A traditional and reliable escapement design that contributes to accurate time measurement and long-term stability.
- Handheld Design – Compact and ergonomic, allowing for comfortable one-handed operation during fast-paced activities or events.
- Temperature Resilience – Functions reliably within a temperature range of -10°C to +40°C, making it suitable for outdoor use in various climates.
- Clear Analog Display – Features a large, easy-to-read dial with bold markings for quick time tracking during races or training sessions.
- Start/Stop Function – Simple push-button control for starting and stopping timing with precision (note: model SXJ504 operates at 30 seconds per circle and does not support pause/resume functionality).
Technical Specifications
- Model: SXJ504
- Timing Capacity: 30 seconds per full rotation (no pause function)
- Movement Type: Mechanical chronograph with manual winding
- Jewels: 13 synthetic rubies
- Spring Material: Stainless steel
- Hairspring: Nickel base alloy
- Balance Wheel: Single metal light balance wheel
- Escapement: Anchor vertical mechanism
- Operating Temperature: -10°C to +40°C
- Design: Handheld, analog display
- Delivery Note: Random delivery of two styles as shown in images; variations may occur
Benefits & Use Cases
This mechanical stopwatch is ideal for coaches and trainers who need a reliable, no-frills timing tool for athletic drills, interval training, or competitive events. Its battery-free operation ensures it won’t fail mid-session due to power loss, making it a trusted companion for outdoor sports like running, swimming, or track meets. The robust mechanical movement holds up well under frequent use, while the clear dial allows for quick readings even in bright sunlight. Fitness instructors, school PE teachers, and personal trainers will appreciate its simplicity and accuracy when measuring lap times, rest intervals, or performance benchmarks.
Unlike digital timers, this mechanical chronograph requires no setup or charging—just press the button to start and stop. It’s also a great backup timer for environments where electronic devices are restricted or impractical. The durable construction supports long-term use in both indoor and outdoor settings, provided it’s operated within the recommended temperature range.
Important Notes
Please note that the SXJ504 model delivers 30 seconds per full dial rotation and does not include a pause function. If timing exceeds 30 seconds, the hand will reset automatically. This model is part of a series that includes variants like SXJ505 (60 seconds, no pause), SXJ803 (30 seconds with pause), and SXJ806 (60 seconds with pause)—ensure you select the correct model for your needs.
Due to mechanical tolerances, the mainspring may occasionally be wound too tightly during shipping, which can prevent the watch from starting. If the stopwatch does not function upon arrival, gently loosen the crown slightly to release tension on the mainspring. This simple adjustment often resolves the issue and allows normal operation.
Style and color may vary as units are shipped randomly based on availability. Refer to the product images for examples of possible variations. If you have specific preferences, consider contacting the seller before purchase. Regular maintenance is recommended to preserve accuracy and extend the lifespan of the mechanism.
