I don't think that re-creating the high boxed crystal of the Yema Wristmaster would have been easy or cost effective if it was done with a sapphire. It would probably not been as clear or reflection free as well.
I'm more concerned about scratching the polished sides of the case because maintaining an acrylic crystal isn't difficult, but keeping a polished steel surface scratch free can be a hassle.
And then there are the viewing angles and light conditions, because I can always read the dial and it doesn't really matter how I tilt the watch or where the light is coming from. The worst that can happen is a nice distortion effect at the edges, something which I don't mind at all.
And this is also an opportunity to wear the Wristmaster. It's the only cream colored dial in my watch collection and I love it's retro crosshair design with the cursive name at the bottom which use the same style as the one my teachers in France took so long to teach me when I was a kid. I'm wearing it on a brown ColaReb Spoleto strap which is the perfect match on my wrist.
I'm a big fan of watches that are interesting because they are either unique, have interesting features, well designed or simply offer a great value for their price.