Help cleaning and ID

[spotter]

First of all Ive no idea what this is for, can anyone identify it.
Secondly the main problem which is why ive posted it in the restoration section is the soft leather/suede interior has stuck to the device and the glass plates,can anyone advise on how to clean this off without damaging the printed writing.I have tried a sponge with warm soapy water and that doesnt work.
thanks for looking allan

 

[Chris 42 RQ]

Windage/Range calculator

Looks like windage calculation charts for an 82mm Tank gun along with range tables.
Lovely item Spott and very interesting.

As for cleaning I am sorry but I have no idea other than "with great care" which will not help you much!

 

[Weasel]

Hi Spotter,
Thats a really interesting find, i would have to agree with Chris on what it is and cant begin to recommend a cleaning method.
Best regards Weasel.

 

[al'saad]

these are reticles and aim tables for optic sight used on grenade launcher M57 and recoiless rifle M67 82mm.

i have complete sight in my collection in office and i will put some photos on monday.

 

[jayteepee_1999]

Well Spotter, you can tell me exactly what they are now...

 

[spotter]

Well Spotter, you can tell me exactly what they are now...

see previous posts JTP :bigsmile:
Many thanks for all your replies
regards spotter