Pete ... I have this scope as well ... mine is not as nice a shape as yours from what I can see. Nor does it have the lovely cover. The downside to mine is that the edges of the objective are showing early, and faint, signs of lens seperation - this apparently is not uncommon with older optics where balsam cement was invariably employed to secure the doublet. In my situation - so far after acquiring it a decade+ ago the seperation has not progressed and doesnt seem to effect the image; (owners of old optics should be aware that physical shock or thermal shock can cause separation); also the ocular on these Unertl’s has a short eye relief and the metal eyepiece that retains the ocular lens can scratch shooting glasses if you are not careful. The ocular has a really excellent fast focus system though that is very convenient. As common to optics of this period the scope is not waterproof or fogproof which is not desirable for the really ‘keen’ shooters who must tough out rain while competing; users should also be cautious when cleaning these optics as the single coating is a little softer than todays multicoated efforts; and finally an angled (45deg) scope is easier to use for prone shooters than the straight tube provided by the Unertl...
having said all that, and to be accurate, it must be said that the image is excellent and as you point out the resolution is very high (although mine could do with a touch more contrast).