Internet Horology Club 185
Cortebert kM II Kl. b-uhr. Kriegsmarine WW2.
My WWW collection is now complete, time to look for new ventures!
March 29, 2011, 10:37
Claudio CapaldoHi Werner!
Are you able to measure the radioactivity of this beauty?
Since the entire dial is covered by Radium 226 compound, I really wonder to know how radioactive it is!
March 30, 2011, 05:52
Werner RosierHi Claudio, unfortunately I don´t have a geiger counter/meter. The method used on these watches was zincsulfide, as was on the Lange & Söhne, IWC, and Paul Buren. Adrian van der Meijden wrote an article about the Lume on these watches
here They measured the radioactivity of these watches, as the method used was a mixture of Radium226 and zincsulfide...
• Wir fanden 0,015, 0,013 und 0,013 Microsievert/std.
• Die durchschnittliche natürlich vorhandene Radioaktivität betrug 0,011 MICROSIEVERT/STD.
Keine Radioaktivität konnte außerhalb der K.M. Taschenuhr mit voll leuchtendem ZINK SULFID Zifferblatt gemessen werden. Saying no radioactivity could be measured outside of the watch.
All the best to you Claudio
My WWW collection is now complete, time to look for new ventures!
April 06, 2011, 17:47
Claudio CapaldoUnfortunately I don't speak german... It's a pity, since it looks like a interesting article, and wellmade.
I wouldn't have imagined a low leverl of radioactivity, since, for example, the WWW and the B-uhren are quite radioactive, more than the medium average level of radioactivity...
April 08, 2011, 03:03
Werner RosierHi Claudio,
forgive me, I forgot not everybody is proficient in the german language
Here just for you, the english version of the document...
EXPERIMENTS WITH RADIOLUMINESCENT DIALSRegards
My WWW collection is now complete, time to look for new ventures!
April 11, 2011, 08:43
Konrad KnirimHallo friends,
here you see three different types of Cortébert Kriegsmarine deck or navigation watches (B-Uhren):
- big cal 554, luminous (non radiating) dial, II. Klasse
- small cal 534, white dial, Erweiterte II. Klasse (extended 2nd class later in 1944)
- small cal 526, white dial, III. Klasse
. Gruesse/Regards/Salute Konrad Knirim
. konrad.knirim@t-online.de
PS: Have a look at my books on Military Timepieces:
.
http://www.knirim.de November 23, 2011, 16:58
Werner RosierHello Sergey,
yes it´s probably a real KM Cortébert, but the markings on the back have been removed.
Regards
My WWW collection is now complete, time to look for new ventures!
March 09, 2013, 14:04
Svechnikov SergeyGood afternoon.
Home, here are such a pocket watch.
This is exactly the original?
What has value among collectors?
My address 63199@mail.ru