Okay, need you to weigh in here.

Recently I noticed that my watches, when sitting in the safe get extremely cold - as I guess you would expect of cold steel And yes it's been pretty cold downunder here in Perth anyway, but even on warmer days I can measure the internal safe temp to around 15 celsius (59 F) today the internal of the safe was approx 12c (43 F). My question being: does this temperature lead to a longer term detrimental effects on the oils and grease effect on the oils which are made to function best, I believe, around circa 20c.

Yes, the OCD is building in small degrees...

 

Best answered by the watchmakers I suspect: @STANDY @Archer @ChrisN and the serial safe hoarders @Spacefruit @gemini4 to name a couple

 

Btw, you ready to sell that Connie back to me yet?

 

12c - cold???????

That's about the average summer temp in the UK!! I'm sure they'll be fine.

 

Sydney's a bit of a freezer - ambient room temperatures without heating are about 9-11 degrees, and my watches sit in an open leather roll. Can't say if that affects them in the long run, they'll still run for me now!

Not yet, still go to watch for smart occasions...reconsolidation may have a word to say about that though.

 

Looking at that chart and those temperature variations I think my darlings should be fine, still, I might ask the wife to make some 42mm case warmers -

 

Of course, the UK and other cold climes and add a cold safe..isn't this the reason the German tanks seized on the Russian front? Not using the correct watch oil and grease in their tanks?

 

Yeah, but there is a difference between +12C and a Russian winter in 1941...

 

True. True. I wonder how the Russian and German military watches performed at -20

 

Haha, you just derailed your own thread.

If the watches in question are speedies, there is this :

1. High temperature test: 70° C for 48 hours, then 93° C for 30 minutes in a partial vacuum.
2. Low temperature test: -18° C for 4 hours.
3. Vacuum test: heated in a vacuum chamber and then cooled to -18° C for several cycles.
4. Humidity test: ten 24-hour cycles in >95% humidity with temperatures ranging from 25° C to
   70° C.

 

Hahahaha - self-derailer - You know me too well, OB! I can't resist the self-derail...

Speedies, Rolexi, Bulova Astronauts and more than a few Zodiacs

 

I assume that this is only during your winter, right?

 

and their drivers running out of pervitin

 

I would never have guessed that -