I had a simple field watch that looked very similar to this while in Vietnam, and decided I wanted one again.

The description of the "R" series ruggedized watches from Ram Instrument includes sapphire crystal, screw-down crown and all stainless case and back, ALL of which are better than my military original.

When I received this watch the quality of fit, machining, and assembly were much higher than I expected from the price. No scratches, machining, or handling marks on the watch at all, and the finish was excellent!

The strap, however, was as expected for the price point, Perfectly adequate but heavier and stiffer than I prefer. I replaced it almost immediately with a tropical military band.

Over the past several months this watch has gained less than two seconds in constant 24/7 wear.

I am VERY pleased with it, and am ordering another as a "back-up" should anything happen to this one.
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EDIT: Well, here I am over three years and one battery later, and this watch is still performing perfectly as a 24/7 everyday wear watch.

The crystal has proved itself to be either sapphire or the hardest mineral glass I have ever seen: Even though there are scars on the billet stainless case, the crystal is yet to get a single mark.

Needless to say, I am very pleased with this watch, especially for the price.

Tom