The scopes were made by Hakko.I believe Julian had them made special order with the brass bayonet fitting attached at the factory. At the time Hakko made scopes for nightforce, tasco, Iightstream and others. They are first focal plane which is excellent for range finding at night.
In terms of glass quality I personally would compare them with any American glass.
As others have said it is the tube fitted to it that matters and also sets the price.with the right tube you will need very little or no additional illumination. I have three day scopes and two night vision units. I have yet to see any digital or thermal that would make me change.
