Resources
VALIDATE A SERIAL NUMBER

You can verify the authenticity of any Hidden Hills watch or product by validating the serial number here.

LINK REMOVAL AND SIZING

All watches produced by Hidden Hills include a link removal tool in the box as well as an instruction card outlining the directions to resize the watch by removing extra links. If you have lost the card, you can click the button below to view it here

LINK REMOVAL CARD


WATER RESISTANCE

Hidden Hills watches feature varying levels of water resistance. Our most recent models are all 10ATM waterproof. To view the limitations of different water resistance ratings for our watches, click the button below

WATER RESISTANCE TABLE


WATCH FEATURES & TIME ADJUSTMENT

Please select your model or generation below to view the model features and adjustment card for your watch

MILLENNIA G1
86400 GENERATION X
86400 GENERATION 3
86400 GENERATION 2
86400 GENERATION 1


CHANGING YOUR WATCH BATTERY

Hidden Hills watches feature an ultra-reliable battery-powered quartz movement manufactured by Ronda AG in Switzerland. The recommended replacement battery is a 1,55V silver oxide watch battery. You can quickly find a replacement by searching Google or Amazon for 364/363 SR621SW or EO-ACZ3-N6RM.

NEED ADDITIONAL SUPPORT?

If you can not find what you are looking for above, please contact us at support@hiddenhillswatch.com and we will assist you there. Please include your watch model and a description of how we can help.
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