Decent very slightly domed AR coated sapphire installed in a Mako! :D
Same crystal as the Seiko Sumo also the same as the 200m Alba divers and a few others too. Sapphire from Yobokies.
Now that I have had a chance to clean out the dust and remove smudges...
More pictures that don't' exaggerate the edge of the crystal so much:
In case you are thinking the sapphire still sticks up to high, neener neener it doesn't stick up quite as far as the stock flat mineral glass!