Seiko released a pair of limited edition Seiko 5’s recently. They are SRP507 and SRP509. This pair features black with red and black with yellow colour combinations respectively. They come with rotating bezel and are powered by the 4R36 movement. The bezel is made using a combination of steel and plastic.
It is not known how many pieces were produced for each model as they are not numbered in the “001/XXX” format.
Here are a few quick shots of the SRP509J.