I've seen some huge binoculars in Yerevan Armenia. They look exactly like the ones sold in the USA under the trade name 'oberwerk',certainly the all in silver external cover is the same.I'd guess these things must be about 100mm and where rigged to take coins for views of Yerevan. They are on top of a war memorial on a mountain top within Yerevan. They looked very good quality and wasted on that wall!the lenses where blue coated but there where shiny bits along the internal barrels.it looked like cast iron but due to the light weight I'm guessing actually aluminium. I think that they are purged too with nitrogen as I could see no fogging up on the prisms. Strange to see such high quality kit wasted like that.I always thought that the oberwerk brand was made in the PRC but I'm guessing maybe they are Russian. Oberwerk,a German type name,is probably just a marketing name which makes nothing itself. German optics equals quality.......... But is it actually made in Germany? My leica 8x20 binoculars where actually made in Portugal and I wasn't impressed as the purging went in one barrel,I've since sold them.likewise not overly impressed by another German brand minox. I have their unusual poro prism 8x25 monocular, sold as the macroscope.the purging is OK but if it's in focus and you point it at the ground it drops out of focus, suggesting 'play'in however it focuses.I'm not sure where this German device was made but it's unlikely to be Germany!