Hawke is a British optics brand with US operations headquartered in Indiana.
Manufactured in China.I have 6 of the Endurance line. Four are 30mm tubes, two are of the older 1" tubes.
Eye relief and glass is great. I have used them on 6mm CM, 250 Sav., 257R, 6.5x55, 30-06, 300 WSM, 35 Whelen and 450 Marlin.
They have held zero and worked perfectly.