Nikos Bratos

Can you tell me what type of strap this is with the screws, and if you can give me some products similar so I can keep the original buckle , This is a Buler Alpha performance, very difficult to find because it is one of the last watches the company made before it closed. For more info DM I cant find the warranty card or manual etc. https://drive.google.com/drive/folders/16GmPTCN-8PkEZpMbD1TAgOKdFCQwaLPR?usp=sharing