This is the CASIO G-SHOCK FROGMAN GWF-A1000BRT-1AJR. It is a limited edition item with a serial number. Rest assured, it is an authentic product. While some serialless models have circulated among insiders, genuine, unused, and perfect ones with a serial number are exceedingly rare. This piece is numbered 01#/300 (the exact number is concealed for privacy; it belongs to the 10 series). Although this item is unused, it has been stored at home, so if you are particular, please reconsider. The item was kept in a darkroom, and thus, solar charging has not been verified. Since the battery has not been replaced, we kindly ask the buyer to arrange for battery replacement through CASIO. There is some wear on the white artificial leather part of the interior box due to age, but please understand that it has been some time since release. **Brand**: CASIO **Model**: GWF-A1000BRT-1AJR **Color**: Red All accessories, including the manual and outer box, are complete. Please note that we do not accept returns or claims to prevent item substitution, so only those who understand this condition should consider purchasing. Please ensure confirmation of receipt is completed within two days of arrival. As this is a valuable product, if you have any questions, please feel free to contact us. We will be glad to assist you. Thank you for your consideration.