Question edited for clarity.
Question moved from Television and Video Category to Watches.
This is an unknown watch in North America. The link might work better for you. It does appear you can change backlight colours.
https://www.google.com/search?q=Mingrui+WR30MIN+watch+change+color
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Clock comes out the front, take a sharp knife and get under the edge and gently work it out working all the way around or it might just pop out with a little nudge if the wood has dried out and shrunk
Question edited for clarity, 'make model (what is is)', and throw in a few capital letters.
Question moved from Computers category to Watches.
No one here will know that, and prices on secondhand watches can wildly vary. Contact the maker for the date. Contact local jewelers for a value. or a site like this
https://www.marks4antiques.com/price-guides/Lucien-piccard-vintage-watches.htm
Hi,
Please pull of the crown/dial and rotate to choose appropriate time/location setting. Then, you will use button a and/or b to choose the location/timezone.
Thank you.
You can try a full reset, but it sounds like it needs mechanical repair. Take it to a local jeweler or send it in for factory service.
https://www.google.com/search?q=Eco+drive+perpetual+calendar+day+repair
And please never put olive oil on a watch as suggested by Roger R. It is too thick and in time goes rancid and gummy because it is plant based. His post is deleted as it contains bad information as well as phone numbers.
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