i dont know, but i been told- that most binocs, like everything else, are made in China. that person said the ones that are no names/made in China types are good units. recalling WWII, Japanese lenses were better than any U.S. manufacturer could produce, so those in my family that served in the Pacific said. more ppl wanted Japanese binocs than wanted swords, something useful.
one thing they must be is well colimated, otherwise you get a headache from hell if you use them for long. the German stuff is top drawer, but a staggering price. i have chinese and they do what i need, which is ocassional use. bird watching, girl watching, neighbor watching, whatever. sportsmans guide had some eagle brand on sale a few weeks ago. best to buy with hands on. ask to take them outside and use them. offer ransome if you do not come back. most stores will allow it. if anything is wrong, bring them right in and swap for an identical pair. if those are NG, switch brands.
the more expensive they are, the more thieves want them. german glass excels by reason of undergoing rigorous inspections as they go down the line, and you pay for it. i would always be fearful of losing them thru breakage, theft, or dropping them overboard. i am careful of what i have, but if lost, i will get some more. worst loss would be being deprived of their use for a while.
hands on if you can.