Features Montblanc watch with GMT function, Star World Time. Model Montblanc Star World Time. Inside it is a 24-hour Arabic index on the 24-hour White & Black color line for GMT. In addition to this convenient high functionality, the quality, and price of the excellent exterior have been highly evaluated, and it has won the Grand Prix in the Small Hands category of the Geneva Watch Grand Prix, overtaking the long-established Swiss brands.