Well, it looks like Seiko has done it again. The new Seiko Monsters that is expected to be released this month, on the 24th to be accurate, will have a different reference for Japan.
This is the Seiko SRPD25K. It will be known as SBDY033.
This is the Seiko SRPD27K. It will be known as SBDY035.
Photographs: Seiko Japan
This is the Seiko SRPD29K. It will be known as SBDY037.
SBDY033 52,000 yen
SBDY035 56,000 yen
SBDY037 62,000 yen
It seems the watches are available for pre-booking, but my understanding is that the SBDY037 is already sold out.