Casio. GAB2100. Poor stuff. Looks fine on the screen writ LARGE but the real thing isn't. Meagre in every way, sadly. Control buttons minute, inaccessible and their labelling just moulded into the plastic in a minimal fashion.
Display well visible only to ants and spiders, lume almost non existent. The instructions have about a hectare of print on legal disclaimers etc. but about two postage stamps of diagrams to explain how to work the thing. At least, partially work it.
Compare. For £150 or so it's easy to buy a cracking good 42mm. dive watch with 200m rating, with date and stainless bracelet. £100 for a children's toy?
Do yourself a favour and fatten up your piggy bank a bit and spend some time looking at the huge catalogue of the First Class Watch Shop