This is a big dive watch with a case diameter of 50mm.  It's actually bigger than the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Seiko-Orange-Monster/dp/B000EI859G/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Seiko Orange Monster</a>.
I own both these dive watches. However, my choice as both a dive watch and a dress watch is this&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Eco-Drive-Depth-Meter-Chrono/dp/B0032FOTRA/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Eco-Drive Depth Meter Chrono</a>

My Eco-Drive was shipped in the special Citizen Aqualand oxygen tank watch gift case (SEE MY PHOTOS IN CUSTOMER IMAGES)

WHAT I LIKE ABOUT THIS ECO-DRIVE CHRONO:

The eco-drive technology - it's a solar power watch: charges in sunlight or indoors with no batteries to change ever :))

The quality black rubber strap actually complements the extremely brushed stainless steel round case and round black dial with three sub dials (24 hours, 60 minutes and 60 seconds)

The rotating bezel has a shiny black finish.  It looks much nicer than the photos

The bezel is of course, unidirectional

50-Minute Chronograph Timer

The scratch resistant curved mineral glass crystal catches every bit of light showing off the watch's attractive black dial (and sub dials)

The date window (at the 3 o clock position) is big enough to be easily read

The luminous hands (although no Seiko Lumibrite) is bright enough to tell the time in the dark (or dives in murky water)

This watch has an underwater depth meter that measures your dive depth in feet.  (If you prefer to measure your dive in meters, then choose the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Eco-Drive-Depth-Meter-Chrono-Metric/dp/B0032FOTQG/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Eco-Drive Depth Meter Chrono Metric</a>)

The watch has a 'Power Reserve' indicator. Although the watch back up battery has a 60 Day Power Reserve for telling the time, the 'Power Reserve' measure is important when planning a dive  since the depth meter uses a lot of battery power

Both the 'Power Reserve' indicator and the 60 seconds sub dial are an eye-catching blue color.  It contrasts well against the black textured watch dial

This Eco-drive Aqualand chronograph is extremely accurate. With no batteries to change, this is a great low maintenance dive watch

This watch is heavy ... even heavier than the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Seiko-Orange-Monster/dp/B000EI859G/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Seiko Orange Monster</a>.  However, with the black rubber strap, this Eco-Drive Aqualand fits comfortably on my hands.

NOTE: This watch that is not going to sit on your hand unnoticed ... it has the look of a luxury watch.

Hope this review was helpful ... Jeffrey A. (Jeff)