The video is no longer available. Did you remove it?
The following is provided for historical reference. Not as a suggestion to buy it. Since it is a webshop/site for buying old maritime equipment. (IT IS NOT a suggestion to buy it)
http://www.gjaltkemp-scheepsantiek.n...44-detail.html
You might want to translate the dutch text. But more importantly I find the view through the optics. Only a line is visible in the right occular! It also has a lever to switch between night and day observation. Not sure what that would do to the optics. Probably restricting the light coming through in daylight.