I’ve had my watch case for over a year now & it’s still in top shape. I remove it from a top shelf & change out my watches daily. So despite the fact that it may not be made of the world’s finest materials, it looks still brand new!
I own several watches up to 45mm (Bulova, Citizen, Invicta, etc) and they JUST FIT. I would not recommend if your watches are larger than 45mm (eg most Invictas, Diseal & other gargantuan scuba watches.)
I have never used the lock/key & have no idea why it would be included (Like it’s really gonna prevent a crime???)