|
TimeTechTalk.com > Time Tech Talk > Time Talk > It's been awhile since this has been explained................ |
|
TimeTechTalk.com > Time Tech Talk > Time Talk > It's been awhile since this has been explained................ |
| Welcome to 3T! Please take the time to register and join in on the friendly,knowledgeable watch talk.Please note that not all registrations will receive an immediate activation e-mail.Those who do not receive an immediate notification will be activated manually within 48hrs. by an admin. without an e-mail activation url sent to you,you may then sign in using your username and password,if you feel there is a problem please e-mail us at timetechtalk@hotmail.com and include your name and username and we activate your account.Thank You! |
| Moderated by: 3T |
|
||||||||||||||
| It's been awhile since this has been explained................ | Rate Topic |
| Author | Post |
|---|
| Posted: Tue Mar 14th, 2006 09:28 pm |
|
1st Post |
|
KenC Admin 
|
I had to refresh my memory and it may be interesting to others and "newbies". Why is a "T" or an "O" marked on each side of the SWISS MADE label at the 6 o'clock position on some watches? (example: T Swiss Made T)............well, here the answer: http://www.ozdoba.net/swisswatch/swiss_to.html Here is the "T" ... On some watches, you will find a "T" on the dial, usually to both sides of the "Swiss Made" notice at the 6 o'clock position. Typically, it looks like this:  Fortis Official Cosmonauts Chronograph GMT This "T" indicates that radioactive material, i.e., tritium (that's why it is a "T") is used in this watch. Don't worry: the radiation will definitely not be harmful to the person wearing this watch. The "activity" used in watchmaking is limited to a value of 25 mCi (milliCurie) which means that no radiation will pass through glass and/or case of this watch. Some manufacturers make a special point of mentioning that they do not use the maximum allowed activity and put additional information on the dial: "T < 25" means that the activity of the luminescent material is below the legal limit. If, on the other hand, you find "T 25" on a watch, the manufacturer informs you that he has used the highest allowed activity; this is sometimes necessary for special purpose watches, esp. for deep-sea diving. If you need a dial or hand replacement for such a "T" watch, it will be necessary to send it to the factory; handling and working with tritium requires special safety precautions and permissions that are usually beyond a "normal" watchmaker's possibilities. Tritium-filled hands are likewise usually not available from watch parts specialists ("fournituriers"). ... and here is the "O"  Patek Philippe Ellipse I asked about this symbol at the Basel '98 show: At Patek Philippe, nobody could tell me what it means - the sales staff present didn't know, and there was none of the watchmaking professionals at the show (I guess these specialists have better things to do than to attend shows ...). At the Perrelet booth, I was lucky to find a watchmaker who could solve the riddle: It is likewise an "official," though nowadays seldom used symbol which indicates that the indices on the dial are made of gold. The letter "o" is used as it is the first letter of the word "or," the French word for gold. According to information from Zenith, it is not an "o," but the Greek letter "sigma;" in this case, the definition with "or" would, of course, not be applicable. Zenith confirmed that it indicates golden indices on the dial so that we can consider this settled. Copyright © 1997-2002 and responsible for contents: Christoph Ozdoba. First version 1997; last edited: March 28, 2002.
|
||||||||||||||
| |||||||||||||||
| Posted: Tue Mar 14th, 2006 10:05 pm |
|
2nd Post |
|
nac Guest
|
Nice post. I knew that about the 'T' once but forgot. I didnt know about the "O" though.
|
|||||||||||||
| ||||||||||||||
| Posted: Wed Mar 15th, 2006 01:43 pm |
|
3rd Post |
|
oagaspar Site Founder 
|
What About the L ? Panerais Have an L on Each Side of the Swiss Made...as Well as a few other Brands 
|
||||||||||||||
| |||||||||||||||
| Current time is 07:09 pm | |
| TimeTechTalk.com > Time Tech Talk > Time Talk > It's been awhile since this has been explained................ | Top |
