Kevin Purcell
Well-known member
They remind me of another classic porro in armor design but I'm not sure which one ... Swaro Habicht, perhaps?
Obviously not saying they are just that they copied a look.
Thinking harder. Not Swaro's but Zeiss or copies of Zeiss or other militarty porros (like the IOR).
e.g. see
http://holgermerlitz.de/six7x40.html
and other pages.
http://holgermerlitz.de/