This is an entry-level CASIO OCEANUS. I bought it in 2009 and used it daily for about six years, but after purchasing an Apple Watch, I stopped using it and it has been sitting unused. It has a timeless design and is working perfectly, so I think it can still be used for a long time. The inner circumference of the band is about 19cm. I have lost the extra links, so it cannot be made larger, but it can be made smaller. Included items: Box, booklet, warranty Operation: Good Scratches/Cracks: As far as I can see, there are many fine scratches on the metal parts from use, but there are no scratches on the glass surface. Color: Black系 (Black-based) Thank you for looking.