This is a Hamilton (ハミルトン) 6313. I received it as a gift, but I'm not going to use it, so I'm selling it. The product name is listed based on the model number. I'm not familiar with chronograph watches, so please look up the specifications online. ・Condition: I think it's relatively clean, but please check the photos as this is my subjective assessment. ・Working condition: Working ・New battery replaced in May 2025 ・Chronograph hands, etc., adjusted ・To pull out the crown, pull up the crown cover first. (See the last photo.) ・Wrist size is about 16cm and it fits, but it's too tight. There are 5 extra links. (See photo) Please purchase only if you understand that this is a private sale. Thank you.