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Hi,

Since I am interested in most topics regarding historical aviation since I was a kid and recently got my hands on a Stowa Flieger, I am very curious as to the function of the twelve o'clock triangle. I've found little information online about the symbol with the triangle and two dots other than that it was used for navigational purposes.

The best text, I've found so far is this:
Pilot's Watch: The B-UHREN
http://www.calibremagazine.com/node/305

The triangle marker was used for the upward orientation of the dial during night flight. Furthermore, it was also used as a solar compass to find the earth's true north in conjunction with sextants, compass and data charts.
Is there anyone out there with knowledge about old school navigation to confirm this? And perhaps explain this in more detail? I'd appreciate it very much and I can take the tech details if you have them. :)

The statement that it was used for upward orientation is a bit strange to me. The position of the crown should be enough to tell which side of the watch is 12 or 6 o'clock, I'd think.
 

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It is easy to find the true North using only the Minute and Hour hands.
The triangle is there to make it easy where the "12" is.
No, I did not follow the thread recommendation.
 
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