The idea of giving “watch” for long service is ancient. I would appreciate if you could consider these suggestions:
1. A locally trip for mini break/ Travel gift vouchers
2. Fine dining experience/ A paid for night out as a team/ High tea/ buffet
3. A year subscription – e.g. Netflix, Disney Channel
4. Any other gift cards or vouchers – e.g. .from Aeon, Ikea
5. Electrical goods
6. Extra holiday/sabbaticals