GW225A-1

Here' s what Casio has to say about the Frogman:

The Frogman has resurfaced as one of G-Shock’s 25 Anniversary Limited Edition releases. With its Solar Power and Dive Function, the Frogman remains an aquatic masterpiece. Engraved with a commemorative 25th Anniversary logo.



Big, chunky, inexpensive, it's everything a G-Shock is meant to be and more.