Optimum Time OS3 Battery Replacement Kit

A battery replacement kit for your Optimum Time OS3 Sailing or Event Watch. 

Contains the exact tools you'll need for removing the back cover and replacing the battery as well as a new battery, seal and grease to reseal it

Kit includes

• Battery
• Screwdriver
• Rubber seal
• Silicone gel
• Tweezers
• Spare screws