Very interesting discussion!
I have been wondering about those “late war” ordnance tan cans for a long time. From my observation, they are all well made, not like those poor repros, but compared with the ordinary green types, they are generally roughly constructed and painted. The paint is applied after the construction, so there is sometimes some on the inside felt. This is never seen on green cans. I have a very late green can for comparison. (BTW, do you know there is clear external difference between early and late green cans? Not about very early internal hinges.) They are very similar, but it is not only the color that is different. Hard to think they came from the same factory in a short period.
And I have seen a 1945 dated picture of a sniper company equipped with tan 6x30 dienstglas and green ZF41 cans on their belt. But have not seen period picture of tan ZF41 can yet. So I am now a bit skeptical on these tan cans.
I am very interested in those cans “found” in France. Maybe there was kov ZF41/1 scopes (parts) together?