Vortex does not provide the country of origin for their Diamondback HD 10x42mm Roof Prism Binoculars. However, the high-end models are produced in Japanese manufacturing sites whereas mid-range and affordable line of products are made in Philippines and China. I would recommend contacting Vortex directly for more specific information.
Yes, the exclusive grey color is the only difference.
Yes, the Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars include:
GlassPak binocular case
GlassPak case harness
Comfort neck strap
Tethered objective lens covers
Rainguard Eyepiece Cover
Lens Cloth
The Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars feature the Vortex unlimited lifetime warranty. Vortex will repair or replace your Vortex product in the event it becomes damaged or defective—at no charge to you.
Yes, the Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars will include:
Comfort Neck Strap, Glasspak Bino Harness, GlassPak case harness, Lens Cloth, Rainguard Eyepiece Cover, Tethered and Objective Lens Covers
The Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars can be used for spotting targets at 100 yards.
The Vortex Diamondback HD models are updated models that have clearer glass. The Diamondback HD models also come with the Vortex Chest Holder and neck strap.
The Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars and the Standard Vortex Diamondback HD Binoculars are going to have cleared glass compared to the original Diamondback Binoculars at the first link below. The Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars and Standard Vortex Diamondback Binoculars are also going to come with the Glaspak which includes the neck strap and chest pack. The second link below has the Standard Vortex Diamondback HD and the OPMOD Diamondback HD models.
https://www.opticsplanet.com/vortex-diamondback-10x42mm-binoculars-d241.html
https://www.opticsplanet.com/vortex-diamondback-hd-10x42-binoculars.html
The Vortex OPMOD Diamondback HD 10x42mm Roof Prism Binoculars are 5.7" in height and 5.1" in width. These binoculars will include:
GlassPak binocular case
GlassPak case harness
Comfort neck strap
Tethered objective lens covers
Rainguard Eyepiece Cover
Lens Cloth
The Vortex Diamondback series of optics are going to have clearer glass compared to the Crossfire series of optics.