I'll be the first to admit that my CIGA Design Z is completely useless as a watch. Most skeleton watches are difficult to read and the Z, being completely illegible, is no exception. It's also very large and very flat, which isn't something I usually like to wear.
But having a large slab of non AR coated sapphire on top is exactly what made it such a good subject for experimenting with the polarizing filter on the G12. The photo on top shows what it looks like under direct sunshine. There is so much light bouncing back from the crystal that the Z can be used as an emergency mirror to flag rescue plans.
The second photo shows the results of using a polarizing filter. The faint reflections from the titanium case are still there, but the hazing on the crystal is mostly gone.
It's not a panacea because the effectiveness is not 100% and is highly dependent on the angle of the shot and the position of the sun. That's why these filters can be rotated to find the best angle at which they cut most of the reflections.
Despite calling it useless I do like the CIGA Design Z. It's titanium case is very large, but it's also light and it has a different and warmer feeling than stainless steel. The Z is completely useless at being a watch but it's also a pleasure to watch the cogs and the balance dance their tik-tok dance and it's actually very well made together. as long as I don't have to rely on it to tell me the time I don't mind wearing it, although I still have to admit that it's a bit too large for me.
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.