Is the GA-100 good for swimming?

Yes. It is rated to 20 ATM (200m), which covers swimming and snorkeling. Casio does not rate it for scuba diving.

How does it compare with the GA-2100?

The GA-2100 is much slimmer and lighter with a cleaner analog-digital face. The GA-100 is bigger, heavier and has more subdials and buttons.

Yes. It has an LED light that illuminates the digital display, and the hands have luminous paint.

It uses a CR1220 cell. A jeweler or watch shop can swap it, and Casio rates the battery for about two years.

It is a large watch at roughly 55mm across the case. If you have a slim wrist, try it on or consider the smaller DW-5600.

No. It has no radio control or Bluetooth, so you set the time manually. World time covers multiple cities once set.

At Jomashop, for $79.00, 30% under what the other stores charge, as of our latest check.

Rated 3.4 out of 5 from 1,200 ratings.

16 stores we checked sell it, including Jomashop, CreationWatches, KICKS CREW, House Of Scuba, Newegg.

$79.00at JomashopChecked 6 h ago

30% under what the other stores charge

Compared across 16 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.