This is the 6508 version which is the newer version of the 6506.  It has been updated with a better armor coating and submersion pressurized for deeper diving to 6 ft. 

The Steiner 10x42 Tactical R Binoculars incorporates the SUMR targeting reticle system, making it an ideal binocular for coordinating and directing small arms fire. This compact design is specifically made for tactical surveillance and operations. Using updated optical system formulations, fully multi-coated optics and a completely revamped shock and waterproof housing, the Steiner 10x42mm Tactical R Binoculars delivers a new standard of performance in a tactical binocular. The Mil Reticle Targeting System allowing faster and more accurate communications between the spotter/observer and shooter or weapons delivery personnel.

With its integrated universal reticle, the Steiner 10x42 Tactical R Binoculars are a smaller, rugged and light weight design with magnification power that matches the favored magnification of the newer 10x Military rifle scopes used by Army, Air and Marine SOF and LE Forces on rifles in calibers from 5.56 thru .50 BMG and beyond. The reticle is based on the standard Mil System. The binocular reticle is truly a multi-role tool since the reticule's mil graduations combine standard 5 & 10 mil increments that reduce down to single and split mils towards the center of the view area enabling the user to effectively accomplish observations, coordinate direct and indirect small arms fire. The Steiner 10x42 R Tactical R Binoculars also feature an ergonomically designed housing, and a special rubberized armor covering to protect the binocular from the harshest conditions.