MWC Watch Tin
These are brand new MWC tins with the original cardboard outer box they are available in two sizes as below:
Small: Fits all G10, Vietnam Models, GG-W-113/A-11/A-17 etc, also MKIII models.
Large: Fits Chronographs, divers watches, CLIX aviators etc.
If you are uncertain which is best the larger tin is a way to play safe because any watch with over 20mm strap size will fit fine.