Technomarine Reef Sun TM-523003 45mm – sport chronograph timepiece with jeweled dial and technical silicone strap.
A bold expression of precision engineering, this timepiece combines Japanese quartz reliability with statement-making design. Built for those who demand performance and presence, it delivers stopwatch functionality, luminous visibility, and depth rating suited to aquatic pursuits or everyday versatility.
| Benefits |
| Chronograph function tracks elapsed time up to one hour with dedicated subdials for tactical timing and multi-tasking precision. |
| Eleven gemstone hour markers catch and refract light, enhancing legibility while adding visual distinction. |
| 200-meter water resistance supports swimming, snorkeling, and surface water sports without compromise. |
| Key features |
| Red dial with silver-tone luminous hands and minute markers for high-contrast readability in varied lighting. |
| Black ion-plated stainless steel case with fixed bezel and screw-down crown for secure operation. |
| Scratch-resistant mineral crystal protects the dial and maintains clarity through daily wear. |
| Who it's for |
| Adventurous individuals who appreciate sport-inspired aesthetics with functional chronograph capability. |
| Those seeking a bold statement piece that transitions from active pursuits to casual wear. |
| How to wear |
| Wind the screw-down crown clockwise to secure water resistance after setting time or using chronograph functions. |
| Use chronograph pushers to start, stop, and reset elapsed time tracking; ensure crown is fully tightened before water exposure. |
| Specs |
| Movement |
Japanese Seiko Instruments VD53 quartz chronograph with 12/24-hour display and date window at 4:30. |
| Case |
45mm diameter, 14mm thick, black ion-plated stainless steel with mineral crystal and solid caseback. |
| Strap |
Red silicone, 24mm width, 210mm length, tang clasp closure. |
| Water resistance |
200 meters, 20 atmospheres, screw-down crown. |
| Functions |
Chronograph with small seconds at 6:00, 60-minute counter at 9:00, 24-hour indicator at 3:00, central elapsed seconds. |
| Power source |
371 battery, quartz accuracy rated within 20 seconds per month. |
