Kikkerland Solar Queen not working anymore - Kikkerland Solar Queen Limited Edition

I am thinking you need a new battery. It appears to be a battery operated watch that runs on solar power IF there is light.

How long will a Timex Solar watch last?
The solar movement functionality creates an environmentally-friendly and maintenance free timepiece that can be charged through indoor fluorescent light or outdoor sunlight. Once fully charged, the battery life can reach two months. If worn daily, there is very little chance the watch will stop.

Solar Powered Watches ' Timex Blog

Yep. Battery doesn't hold charge anymore. It is probably ni-cad battery and they have limited life span

The internal cell may require to be changed. It is very important you use the proper cell for your watch. This is assuming the solar cell is working properly.

Defective watch?

Take the watch to the jewelers, if the rechargeable battery has failed or solar power issue, it needs to be checked out by a professional.

If you haven't got instructions on how to do this, you can get
instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

Sounds like the solar back up cell needs to be replaced. You can get it repaired for rather cheap less that $30(US). You can contact www.casiosalesandservice.com to have it serviced. 877.659.0761

The watch needs a new battery.

Go to this link; http://world.casio.com/wat/download/en/manual/ and enter the four digit code on the back of the watch, you should get a user manual - i do think you are probably right however. Hope this helps :)