Lumtec phantom sapphire glass crystal upgrade m series mphantom Watch Accessories

Lum-Tec Phantom Sapphire Glass Crystal Upgrade for the M-Series MPHANTOM The Phantom Sapphire Crystal is effective for "blacking out" the face of the watch, yet still traps enough light inside to keep the glow burning at night! Amazing effect! The AR coating outside lets light in, and the mirrored inside traps in into the... Lum-Tec Phantom Sapphire Glass Crystal Upgrade for the M-Series MPHANTOM