These date from 1909 approx.
Hensoldt traded as Wacht from 1905 to 1909.
these are late in that period.
(Thanks chevyjonny on Wehrmacht Awards)
You can see the state they were in. Extensive Fungi, lenses & Prisms very cloudy.
The Prisms are in long slots, 3 or 4 mm play either end. I tried to mark their positions best I could on removal. I should have taken more care.
I ended up assembling Binoculars without Prism covers, Prisms had to be moved back & forth in slots to collimate. Not as difficult as it sounds.
But time consuming. There is no reticle which is a shame.
Finally assembled again.
Compared to some Leitz Binux 8*30. Against which they hold up quite well.