Zeiss 10*50 Service Glasses. Or not?

[Eighty Eight]

Picked these up today.
Can anyone tell me what they are?
I assume 10*50. WW2 or before? Or much later?
Field lenses are very big! 25mm diameter ish.
Fungi present but nice view.
Replacement eye cups & leatherette.
Should eye cups be taller?

[Sgt Bilko]

A lightweight (pre 3 letter code) Dienstglas 10x50 with the details scratched out and the blue dot cold weather grease.

[Eighty Eight]

Of course! Blue dot under the logo!
Only noticed it on the photo. Was wondering what it was.
Thanks Bilko.

The view seems pretty good considering optics condition.
Are they decent performers?

Anyone got a spare prism plate knocking around?