Sorry, only just seen this. It is a custom build by Yobokies based in Hong Kong, using a NOS Seiko SNZH case and his own dial, hands, insert. Here is a link to his website:
https://theyobokies.com/
Unfortunately he has just run out of NOS cases and I'm not sure that he will make these using a used one.
I'm looking to have another made using a UK modder and have just bought a used SNZH57 to use as a base. Here is a list I found of UK modders, if that helps.
https://www.dlwwatches.com/pages/glo...tlistofmodders.