Binocular marking

[Lassi]

Hi guys

what dos the triangle indicate on a pair of German binoculars?

Hope you can help me

All the best
Lars

[benutzer]

It shows what kind of lubrication grease is inside.

[Lassi]

Originally Posted by benutzer

It shows what kind of lubrication grease is inside.

Thanks but why would that be important?

Regards
Lars

[Stew]

the binoculars have grease in their ocular lens assembly to permit focussing, and in their hinge asembly.
In extreme cold weather the mechanism might freeze solid unless a suitable grease was used. Various greases were progressively introduced to cope with the conditions that ultimately ranged from-40C to 50C.

" KF" intro May 1940 -41 servicable to -20 C
"O" Aug 42 -40C
"+" Nov 42-44 -40C
"blue Triangle" late 43 - 45 -40C to 50C

[Lassi]

Originally Posted by Stew

the binoculars have grease in their ocular lens assembly to permit focussing, and in their hinge asembly.
In extreme cold weather the mechanism might freeze solid unless a suitable grease was used. Various greases were progressively introduced to cope with the conditions that ultimately ranges from-40C to 50C.

" KF" intro May 1940 -41 servicable to -20 C
"O" Aug 42 -40C
"+" Nov 42-44 -40C
"blue Triangle" late 43 - 45 -40C to 50C

Thank you very much

It makes all seance to me now

Cheers
Lars

[Lassi]

Thank you for the help

Got the binos today :-)

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[Lassi]

Rty
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