Thread: Old kahles quality?

I recently aquired a old steel bodied Kahles Helia S 6x42 that came on a rifle I bought. From what I can glean from the Internet it was most likely 70-80s vintage.

My question is is it worth keeping on the rifle? How do these old scopes compare in terms of optics and durability compared to more modern offerings? I'm mainly worried about it not holding zero or fogging midway though a remote trip!!

Currently have it in the freezer to see if it fogs.... also the thicker posts of the reticle have some fine 'fuzz' on them. It's not bad but is this a sign of any other underlying issue?

In board daylight the image looks brighter and sharper than a new Redfield....

Interested to hear people's thoughts. Cheers