Jump to content

Identifying watch for possible radioactive concern


Recommended Posts

Hi there - recently picked up this watch to practice on. Crossed my mind that I'm not sure how old it is, and if it's 60s or earlier might have radioactive lume? Don't have a Geiger counter and am hoping someone can identify and weigh in please. Dial says "Cornell", movement says "Shriro watch Inc", case back inside says "TK Co, made in France". Any info would be helpful and much appreciated please, thank you!

IMG_5211.jpeg

Link to comment
Share on other sites

Sometimes you can see a burn mark on the dial from hands that have stayed in one place for decades, which is a clincher, but I don't really see that here. 

An inexpensive detector could let you know for sure, but considering the dial/hand style and the darkened condition of the dots on the dial in the absence of any clear water damage, I'd give 90% likelihood that there is radium there.  Tritium is usually marked out on the dial, and although it moves to yellow and tan as it ages, it doesn't get as "toasty" as those dial spots based on what I've seen.

  • Like 2
Link to comment
Share on other sites

28 minutes ago, Geotex said:

An inexpensive detector could let you know for sure

Definitely worthwhile, if you are working with old watches - just be sure it's an actual Geiger counter, not one of the vast range of scam/fake "Radiation detectors" on ebay & amazon etc. that detect RF or static electricity...

 

In the mean time, I'd put the dial and hands in zip bags & wipe down the work area with a damp cloth to pick up any dust, then discard the cloth.

The emitted radiation from radium lume is not normally harmful - but inhaling or ingesting a single particle of the material can cause serious long term harm, so do take care with it.

 

  • Like 2
Link to comment
Share on other sites

Posted (edited)

Thanks all. I had ordered a Geiger that's showing up today but was hoping someone might be able to identify the watch to help me get ahead of it, so thank you Geotex. I in no way planned or plan to risk my health over watches and will probably trash this to be safe, it just stupidly didn't register for me how old this watch could be before I had opened the thing up. Sticking to explicitly newer watches going forward.

 

The counter I ordered is a GQ GMC model, which I have seen mentioned and used by many people and seems to be legit. https://www.gqelectronicsllc.com/comersus/store/comersus_viewItem.asp?idProduct=5786

Edited by kr2
Adding info about Geiger counter purchased
Link to comment
Share on other sites

Posted (edited)

Well, Geiger counter showed up today and the dial and/or hands were extremely radioactive, reading quickly spiked from a baseline of 10-20 cpm to 100 and was still rising when I removed it. Trashed the whole thing. Thankfully nothing else outside the components was registering - work surface, tools, the paper I had used to clean off some components.... 

 

And now I have a Geiger counter to use to  check practice watches BEFORE disassembly

Edited by kr2
Typo
  • Like 1
  • Sad 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I've got a similar one, but never had to use it yet. I would try a couple of M4 (or whichever) washers under each blade, and possibly longer countersunk machine screws, either hex or torx drive so the blades can be really solidly locked down. It does not appear there can be much depth of thread in the blocks above the slide shafts, so matching the screw length to the blade height is probably quite important.
    • Don't the holders have different sizes front & back? I started out with some cheap cast metal ones, but had a lot of trouble with the movements coming loose, so I got a pair of Bergen ones from cousins, a 4039 and a 4040. Those a well made, properly machines and between them they cover from around 10mm up to all the pocket watches I've had so far.  
    • Hi Friends, As you might have seen yesterday I'm on to my second restoration and its a Seiko from the 70's (i'm pretty sure) I need to source a new Crystal but I'm struggling to figure out how to identify what type it is. (I did some forum searching but couldnt come up with anything) I'm pretty sure its mineral glass (and that lines up with what I've read online) the outside is flat, there is a pretty good sized bevel around he outside edge, but the inside is surface is concave. It measures 31mm in diameter, and at its thickest (around the edge) its 2.1mm. I was hoping to hop on Esslinger to order up a replacement but that hasn't worked out. I can't find anything of this style.  Any ideas? Thanks so much. 
    • I'm having difficulty finding an exact match to the spare case & what movement it originally had? The nearest I can find are the Power Glide, with a 560RSS movement and Borgel case - though that model has a deep case back for the automatic works, while my case has a flush back. https://gruen.watch/?product=gruen-geneve-23-precision-power-glide-560rss https://www.birthyearwatches.com/product/c1959-gruen-power-glide-automatic/ The case shape and crown detail are identical to that, and dimensions match except for depth.   The 560 appears to be the same diameter as the 510 and from the same era, so it does seem possible that it's for a less common 510 version? I just have to find an appropriate dial to suit it.  
    • A have this chinese clone DG2813 movement can a eta 2813 mainspring fit in this movement it doesn't tell you what mainspring to you in this movement are very similar ?
×
×
  • Create New...