For around £ 100.00 for my sons Chrimbo prezzie, hes 16 years old and needs something bomb proof/water proof and robust.

Hes already got a Casio G Shock which is on its last legs so does not want another.

Cheers.

These are the genuine Military issue watches. Available new for muchly over budget, but usually available here for well within budget (in fact, they often sell them by the boxful).

edit – looks like the bog-o ones are available for about £130.