The Waste Electrical and Electronic Equipment (or WEEE) Regulations are now U.K. law and this basically means that distributers (us) of electronical goods (like wristwatches) are responsible for disposing of said goods. That means you can send your old unwanted watches back to us though there are conditions.
First of all you can only send WEEE back to us if you have puchased EEE (Electrical and Electronic Equipment) from us, or in English, buy a watch from us and you can send us an old watch back. If you do send us WEEE back than you need to do this within 30 days of receiving you new EEE. We can refund you the cost of postage (within reason) if you comply with these conditions. There are no additonal charges for this service so it is essentially free of charge.
The idea of WEEE is to make sure that we no longer just throw away electrical stuff into landfills. This is environmentally unfriendly and dangerous to human health as WEEE contains hazerdous chemicals and non-biodigradable substances so we need to dispose of such stuff in a better fashion, like recycling for instance. By sending WEEE back to us we pass it onto the experts who can dispose of, recycle or reuse WEEE properly.
You can tell if a product needs to be disposed of in accordance with WEEE regulations if you see the symbol here on the right somewhere on the product or on paperwork associated with the product. When you see this symbol your role here is to make sure that you do not just throw your WEEE away in the municipal waste but pass it on to the appropriate people.
Because watches are quite small you will noramlly have to look in the paperwork but it is probably safe to assume all watches are WEEE.