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 Post subject: Re: Breitling 1191
PostPosted: Wed Jun 07, 2017 2:55 pm 
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buddman wrote:
So not radium then I guess.


+1

Radium doesnt need a 'light charge' to be luminous in the dark , so its Tritium or newer

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 Post subject: Re: Breitling 1191
PostPosted: Wed Jun 07, 2017 3:07 pm 
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my HIGHLY limited knowledge is that this is what radium does -- glow under UV then rather quickly stop glowing.


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 Post subject: Re: Breitling 1191
PostPosted: Wed Jun 07, 2017 11:01 pm 
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Dracha wrote:
buddman wrote:
So not radium then I guess.


+1

Radium doesnt need a 'light charge' to be luminous in the dark , so its Tritium or newer


Where are you getting your information from? The article I liked to from one of the worlds more serious Rolex collectors says Radium will need a UV light source to glow. You can even see that the lume has broken down in places by comparing the UV photos to the ones I did with the microscope.


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 8:29 am 
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Well it's Radium!
Where do we go from here?
Anyone else still on the fence?
Image


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 1:05 pm 
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Either your measurements are off or mine are , here is what i measure on a 1960 radium dial


You do not have the required permissions to view the files attached to this post.

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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 1:48 pm 
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Rene, the 20-25 range is fairly typical ?
73 is extreme, I think, we should check w/ Jack or Roy Davidoff, who did a ton of research ?


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 1:57 pm 
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WatchFred wrote:
Rene, the 20-25 range is fairly typical ?
73 is extreme, I think, we should check w/ Jack or Roy Davidoff, who did a ton of research ?

His reading is only 1.38 so something is off with his reading
Any more thoughts on my watch Fred?
Thanks


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 2:39 pm 
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Before stating my reading is off , do a search and find out how much 20 microsiev really is , ive done some searching and there are videos of old military watches that show in the 1.2 to 1.9 range , 20+ is cause for alarms to go off

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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 2:41 pm 
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Ps fred , 73 is the cpm count , 1.38 is the siev count , the 1191 dial is 15 times higher

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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 2:47 pm 
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Rene - I don't understand the importance of your comment. Whats the issue if the 1191 dial has a higher reading than your dial? Doesn't that fact that it measures anything at all on the Geiger say its Radium? Wouldn't the reading be somehow proportional to the amount/concentration/makeup of the radium paint originally applied?


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 2:54 pm 
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Dracha wrote:
Before stating my reading is off , do a search and find out how much 20 microsiev really is , ive done some searching and there are videos of old military watches that show in the 1.2 to 1.9 range , 20+ is cause for alarms to go off


You said mine or yours was off. I think yours is off in the article I linked to the readings were between 5 and 37 and these were dive watches with better seals & thicker glass. Are you sure you had a correct reading?


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 3:14 pm 
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Montys wrote:
Dracha wrote:
Before stating my reading is off , do a search and find out how much 20 microsiev really is , ive done some searching and there are videos of old military watches that show in the 1.2 to 1.9 range , 20+ is cause for alarms to go off


You said mine or yours was off. I think yours is off in the article I linked to the readings were between 5 and 37 and these were dive watches with better seals & thicker glass. Are you sure you had a correct reading?


I didnt see an article linked ?

I am quite sure my reading is correct , compare to this reading of a radium rolex (5.4 microsiev) I assume (by eyeing the amount of lume) the rolex has more lume material than the 1191 dial so emits more

http://www.watchprosite.com/page-wf.for ... i-6840528/

this clip shows (@2.04) 2.44 microsiev
https://www.youtube.com/watch?v=ayghIDng8X8

here a bakelite GMT shows 'only' 9 microsiev
http://rolexpassionreport.com/21770/the ... olex-dial/

so the 21+ is incredibly high , hence I doubt the measurement or tool ?

for comparison , here are some articles with 20 microsiev are mentioned

close to fukushima

http://enenews.com/20-microsieverts-hou ... maps-chart

Radiation Dose: 3.5 microsieverts
Exposure: Lowest daily dose within 30-60km of the Fukushima nuclear plant (3/20)
https://www.allianz.com/en/about_us/ope ... acf094c83e

On March 28, the highest reading occurred approximately 20 km from the Fukushima plant at 78 microsieverts per hour.
http://science.time.com/2011/03/29/fuku ... bad-is-it/

So the measured 21 micro seems awfully high , higher than any other watch that I can see , including old military and rolex watches

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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 3:17 pm 
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In the rolex passion report article the readings are 5-37. I have a 1945 Tudor and a WW1 issued pocket watch to test tomorrow.


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 Post subject: Re: Breitling 1191
PostPosted: Thu Jun 08, 2017 3:30 pm 
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Montys wrote:
In the rolex passion report article the readings are 5-37. I have a 1945 Tudor and a WW1 issued pocket watch to test tomorrow.


great , please measure a tritium watch as well ?, as reference point ?

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 Post subject: Breitling 1191
PostPosted: Fri Jun 09, 2017 1:38 am 
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Dracha wrote:
Montys wrote:
In the rolex passion report article the readings are 5-37. I have a 1945 Tudor and a WW1 issued pocket watch to test tomorrow.


great , please measure a tritium watch as well ?, as reference point ?


Have you got any other watches to compare with to see if your counter is working correctly?
You would expect a Tritium dial to have a zero reading as it emits Beta particles and we are testing Alpha/Gamma particles given off by the Radon-222 gas. (my dad did his degree in physics)


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