---
product_id: 737895925
title: "Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013"
brand: "optimum time"
price: "₨1065"
currency: LKR
in_stock: false
reviews_count: 1
url: https://www.desertcart.lk/products/737895925-optimum-time-os-310-white-same-as-315-sailing-watch
store_origin: LK
region: Sri Lanka
---

# 38mm x 20mm ultra-clear display Water resistant up to 5 ATM Adjustable viewing angle for perfect sightline Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013

**Brand:** optimum time
**Price:** ₨1065
**Availability:** ❌ Out of Stock

## Summary

> ⏱️ Own the race start like a pro with Optimum Time OS3 – where precision meets performance!

## Quick Answers

- **What is this?** Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013 by optimum time
- **How much does it cost?** ₨1065 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/737895925-optimum-time-os-310-white-same-as-315-sailing-watch)

## Best For

- optimum time enthusiasts

## Why This Product

- Trusted optimum time brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Shock resistant and water resistant to 5 ATM, designed to withstand the toughest sailing conditions.
- • **Effortless Night Use:** Electroluminescent backlight ensures clear visibility even in low light or night races.
- • **Race-Ready Visibility:** Large 16mm digits and single-row display make countdowns impossible to miss.
- • **Pro-Level Sailing Timer:** Pre-programmed ISAF start sequences with sync button keep you perfectly timed every race.
- • **Versatile Mounting Options:** Wear on wrist, sleeve, or mount on boom/mast with included bracket for ultimate flexibility.

## Overview

The Optimum Time OS 310 WHITE Sailing Watch is a professional-grade sailing timer featuring a large, easy-to-read 38mm x 20mm display with 16mm digits, adjustable viewing angle, and versatile mounting options including wrist, sleeve, or boom/mast bracket. Water resistant to 5 ATM and shock resistant, it’s built for durability in harsh marine environments. Pre-programmed with ISAF/World Sailing start sequences and equipped with a sync button, it ensures flawless race timing. The electroluminescent backlight guarantees visibility in all lighting conditions, making it the essential tool for competitive dinghy sailors worldwide.

## Description

Product Description               Optimum Time OS3 Big Sailing Watch Optimum Time OS Series 3 watches are the market leader of dinghy sailors worldwide. The large face of the watch allows sailors to easily see across the boat and count down to race start. With so many features, this sailing watch is an essential tool for the avid racer. Key Features of the Optimal Time Sailing Watch Large ABS case with 65mm overall 38mm x 20mm display size Large 16mm digit height Single Row Display. Adjustable Viewing Angle Boom/Mast Mount Bracket Included Elastic straps that can be worn over wrist or sleeve Water resistant to 5 ATM. Shock resistant construction Normal timekeeping mode (12 hours or 24 hours) Professional Sailing Timer Function: Countdown repeat option or Countdown and up to show elapsed time of handicap races. 5, 4, 1, 0 ISAF/World Sailing Start Sequence Pre-programmed to hear warning signal (mute if needed) Multiplies of 5 minutes, 3 minutes, and 1 minute programs "Sync button" allows you to instantly sync when you lose your gun. Buy your OS Series 3 Sailing Watch today and choose from a variety of colors.                   Directions               1. Remove the watch from the package. 2. All removable parts should be washed with warm soapy water. 3. Place the watch on your wrist, clothing, wetsuit, or strap the mast or boom 4.Rotate the face to get the best viewing angle. 5. If you missed a gun, you can use the SYNC button to sync immediately. 6. Sailing has alarm to hear 5, 4, 1, 0 sequences or 5 minutes, 3 minutes and 1 minute programs. 7. If other than sailing, please use the countdown and repeat or countdown and up function. 8. Hydrolock(TM) Dual Seal Technology ensures your watch is water resistant up to 5 ATM. 9. If the watch does not work within the first year due to material or manufacturing defects, please return it to the address provided for repair or replacement. 10. Please store the booklet and your certificate of purchase               
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                    Safety Warning               Please handle with care to avoid misuse, improper maintenance, wear and tear and accidental damage             See more

## Features

- 38mm x 20mm display
- Adjustable Viewing Angle
- Boom/Mast Mount Bracket Included
- Adjustable elastic straps
- Water resistant to 5 ATM
- Shock Resistant
- Electroluminescent backlight function
- Normal timekeeping mode (12 hours or 24 hours)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Optimum Time |
| Model Number | OS310 |
| Package Dimensions | 10.1 x 10 x 5.1 cm |
| Color | white |
| Size | One Size |
| Special Features | Second Hand |
| Power Source | Battery Powered |
| Battery Type | Silver Oxide |
| Lithium Battery Packaging | Batteries contained in equipment |
| Package Weight | 0.12 Kilograms |
| Batteries Required | No |
| Batteries Included | No |
| Brand Name | Optimum Time |
| Country of Origin | China |
| Item Weight | 0.26 Pounds |

## Images

![Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013 - Image 1](https://m.media-amazon.com/images/I/71+yFs3JUEL.jpg)
![Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013 - Image 2](https://m.media-amazon.com/images/I/61x7thcBT6L.jpg)
![Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013 - Image 3](https://m.media-amazon.com/images/I/61UBs4i36XL.jpg)
![Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013 - Image 4](https://m.media-amazon.com/images/I/61o7mdj6peL.jpg)
![Optimum Time OS 310 WHITE same as 315 Sailing Watch Series 3 WHITE NEW for 2013 - Image 5](https://m.media-amazon.com/images/I/61cHL4O+lIL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 説明書がわかりにくいが
*by P***N on January 1, 2025*

説明書がわかりにくいがスマホの翻訳アプリ使ってなんとか理解出来、使い勝手はバッチリでした。

## Frequently Bought Together

- Optimum Time Series 3 Sailing Yachting and Dinghy Watch in White - Water Resistant Race Timer for Sailing Yachting and Dinghy
- LITTLE HAWK MK2 APPARENT WIND INDICATOR (for Dinghies up to 6m) - mounts at front of mast at gooseneck height

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-25*