Hvad koster et Beobachtungsuhr mon?

[jk]

MichaelSC Skrev:Jeg tror at kronen er helt original, såvidt jeg kan vurdere så findes der mindst to forskellige originale IWC kroner til B-Uhr; den kegleformede og den cylindriske.

Mvh
Michael

Helt enig. Der er meget, der tyder på, at urene var leveret med den kegleformede krone, men den gav problemer, så man skiftede ofte til den cylindriske ved serviceeftersyn. Se dette indlæg fra IWC forum:

"From this search I have concluded that IWC manufactured 1005 B-Uhr, 1000 delivered at the same time to Siegfried Heindorf, Berlin in 1940, for the Reichs-Luftfahrtministerium for the use of the Luftwaffe bomber squadrons for astro-navigation, and 5 for tests which remained at IWC.
The conical and cylindrical crowns appear randomly on B-Uhr with lower and higher case numbers, which suggest that cylindical crowns are probably the result of maintenance. My personal theory is that the conical crown was prone to separation, and was replaced by the cylindrical crown.
I've shared this, and other interesting facts and data, with real B-Uhr experts who either already knew it, or agreed with it."
(skrevet af Clepsydra)

JK