2,0 cm Viewfinder

I’ve recently picked up this viewfinder. I decided to go for it because I’ve never liked the 90’a TV set style of the Russar finder and parallax doesn’t cause me enough concerns especially so on a 20mm lens.

Seems to have very scant info about it on the interwebs. No factory name, nothing.

I found this https://lens-db.com/russar-mr-2-20mm-f56-lsm-1958/ with a very similar finder for the russar



Edit: and another one https://www.ebay.de/itm/375924895937?chn=ps&_ul=DE&google_free_listing_action=view_item&gQT=1

www.a7camera.com www.120folder.com www.instantphoto.eu www.135compact.com www.oddcameras.com
www.subcompactcam.com