Identifying this type of chain link

#1
Hello can someone please help me identify this type of chain link. I have a friend who got this chain from his grandfather and i love how it looks. I want to buy or even make the same necklace. I can’t find the the link type nowhere though. So please some help. EF0B6C52-FC60-4096-A664-5631E0C413CF.jpeg
 
Top