Approximately 3.5cm wide. This is a Seiko Tomony mechanical men's watch for sale. It's from my father's watch collection, an antique hand-wound watch with a classic design that suits any occasion ☺︎ There may be minor scratches and clear marks from use, including on the glass surface, but it still has a good luster and I think it's in pretty good condition. Please check the images carefully. The strap has been replaced with a new, non-original leather strap that looks natural. This is a very old hand-wound watch, so I cannot guarantee its future operation, but it is currently running without major errors (I have not performed any maintenance such as an overhaul). As it is now, the screw (crown) can be wound normally by hand and it doesn't stop immediately... Quick change is also fine. No accessories included. I am very sorry, but please absolutely do not purchase this if you are not familiar with used items, are overly sensitive, or do not understand the above explanation, or if you have any concerns. Mercari is a place for private sales. It is a used item in its current condition and is inspected by an amateur (100% perfection is absolutely impossible). Thank you for your understanding. A popular model of antique watches ☺︎ This is a Seiko Tomony mechanical (hand-wound) men's watch. Please make it a proud treasure... #Seiko #SEIKO #SeikoSchoolTime #SEIKOSCHOOLTIME #SCHOOLTIME #SeikoHandWoundWatch #HandWoundWatch #MechanicalWatch #SeikoTomony #Tomony #SeikoTomonyHandWound #SEIKOTOMONY Movement: Hand-wound (mechanical) Belt Color: Black Accessories: None