JazxDon't quote me on this, but I think all of the Seikos in Massdrop have been K versions - as in Malaysian built - with the exception of the Shinobu Ishigaki SARB065 (I think I've seen a couple of other execptions, can't confirm). I could be wrong, but I've also only heard or read about people with K versions.
AntibacterialNope. K just means made outside Japan. For their automatic divers is generally points to Singapore/Malaysia facilities, and rumor has it that most come from the Malaysian one.
JazxOther people have commented on this, however these are the K1 versions. There's no official place to look this up, however many enthusiasts concur that K1 versions are assembled in Malaysia and are intended for worldwide distribution outside of Japan.