To celebrate the upcoming 2013 30th Anniversary of the G-Shock, in conjunction with ProfessionalWatches, Casio USA is giving away the Casio GW3000BB-1A G-Shock Aviation watch (shown above). Entering is simple, just “Like” the Casio G-Shock and PW Facebook pages.

The G-Shock Aviation features a 50 mm by 16 mm black resin case. Analog display, solar powered Japanese quartz movement, 6-band atomic, mineral crystal, chronograph, alarm, worldtimer, 200 meter water-resistance and more.

One winner will be drawn at random. Suggested retail value is $280. Winner will be selected Friday September 21st on Facebook. (Open to US residents only.)