This gray and red-accented colorway was not expected to be released in the U.S., as only the black GBDH1000-1 and black and white GBDH1000-1A7 were originally announced for the U.S. market. Amazon sometimes directly sells certain G-Shock and Pro Trek models that aren’t available at other U.S. retailers. As this model is sold directly by Amazon (“Ships from and sold by Amazon.com”), it is covered by a 1-year Casio warranty.
The watch is listed as the GBD-H1000-8CR. (The “CR” denotes that the model is intended for export markets outside Japan, and it is otherwise the same as the GBD-H1000-8.) The listing states that the watch will be released on May 21, 2020.
Other GBD-H1000 models are available for pre-order in the U.S. at Reeds Jewelers.