Hello! To me it looks like a generic brown croc strap. You can probably find multitude of light and dark brown crocodile straps for under $30USD on eBay or Amazon. I would recommend Keleran Straps if you are looking for something that is affordable but still not crap. Hope this helps! -Jake
It reminds me strongly of the Hirsch Louisianalook strap I had on my Constellation after throwing out the badly worn strap I bought it on. I wouldn't recommend them though - within a couple days of wearing it gently the tail end had started to fray. Now I exclusively wear silicone straps which are embossed to look like alligator leather.