Soviet 82mm M1938 Mortar Sight

[Asjemenou]

I can assure you that what you are showing is not a part of a mortar sight but of an artillery compass.
The artillery compass was not placed directly on a mortar or a gun but it was used to adjust a battery of guns (azimuth).
See the instructions for use; Артиллерия .
The artillery compass could also be used by engineers (pontoneers) for the construction of a bridge.
War dated photos of this Soviet artillery compass are not easy to find.
I only know the photo of a BM 31-12 Andryusha with its crew during the battle of Berlin in 1945.
The Soviet soldier on the right has a tripod in his hands and around his waist he carries the typical case of an artillery compass.

[Woolgar]

Thank you for clarifying and for the excellent link on how to use it

Nick

[kradman]

This is the model of tripod used with this compass

[Woolgar]

Thank you for posting

Really interesting to see!

Is this yours?

Nick

[kradman]

yes Nick its mine i brought it a long time ago

[Asjemenou]

Thanks for showing the photos of the tripod. Is the tripod dated?

[kradman]

Its not dated but would have come to Finland with all the compasses taken from the Russians as war booty in the war