My 1963 GMT 1675 with Silver Dial?

[Erpin]

Isn’t it a fact that exclamation mark dial have less potent radium lumes? I am attaching this article from the Rolex Passion Report about exclamation mark dials as a reference.

https://rolexpassionreport.com/316/t...ing-radiation/


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[1watch]

Originally Posted by Erpin

Isn’t it a fact that exclamation mark dial have less potent radium lumes? I am attaching this article from the Rolex Passion Report about exclamation mark dials as a reference.

https://rolexpassionreport.com/316/t...ing-radiation/


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Yes, exclamation dials had a less potent radium mix prior to the transition to tritium with the underline dial. That said, I would expect a reading in at least the higher single digits if the counter is placed correctly over the crystal. As a side note, the less expensive Radex counters that max out at 9.99 aren’t very useful for accurate readings on ‘60 and earlier radium dials imo.


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[LateLearner]

Originally Posted by 1watch

Yes, exclamation dials had a less potent radium mix prior to the transition to tritium with the underline dial. That said, I would expect a reading in at least the higher single digits if the counter is placed correctly over the crystal. As a side note, the less expensive Radex counters that max out at 9.99 aren’t very useful for accurate readings on ‘60 and earlier radium dials imo.


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As a newbie, nothing I post is meant to be taken as guidance—only as my introductory experiences.

The next level Geiger above a Radex RD1530, appears to be more than $200, some much more expensive.

The RD1530 maxes out at 9.99. Therefore, older watches with significant radium should be measured with a better, and more expensive Geiger.

I purchased the cheapest Geiger, merely to determine whether my relumed 1965 5513 was tritium or radium. Sadly, it’s radium.

Also, taking different readings on video, I discovered how slight distances from the crystal affect the readings.

For me, the owner of an inherited 1965 Sub 5513 with (unfortunately) a radium relume, the discussion about Geiger readings on this forum is underrepresented.

It’s my hope I can help generate discussion and shared knowledge about radium.

I’d like to know what Geiger devices are used when posting about microsieverts per hour readings.

They are still out there.


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