The Seiko Prospex HBB006K1 "Blue Tears" is a limited edition made exclusively for Thong Sia, Seiko's authorised distributor in Singapore. It does not appear in Seiko's global catalogue, and it is not a watch that will be restocked once the edition is through. Exclusively available in Singapore, Hong Kong, Macau, Malaysia and Brunei.

Underneath the name is a proper diver's watch. Seiko rates it at Diver's 200 metres — the designation it reserves for watches built and tested for diving rather than simply resistant to water — with a one-way rotating bezel, a screw-down crown and LumiBrite on the hands and hour markers. The blue dial sits behind Hardlex in a 41.7mm stainless steel case, and Calibre 4R35 runs it automatically from the motion of your wrist, with a date window and hand-winding available. It is supplied on a steel bracelet, with a dark navy silicone strap included.