Deciphering COSC readings

[Oceanklassik]

Hi all,

Can anyone here decipher the readings of COSC measurements? I have compared the COSC readings of some PAMs but do not know how to understand the accuracy level of each reading. And I believe there is a date stamped on the date the movement is tested. Does it tell (exactly) the age of the watch?

Tx.

[Oceanklassik]

No one is able to read and understand the COSC readings from the certificate..

[zameenzahari]

I tried and tried....but failed to decipher it

[Oceanklassik]

Anyone like to try? For example, "watch rests on its back with dial facing up = +4 and -6". This means to what extent the accuracy is? Good? Average? Poor? Then what about if the reading is "-1 and +2".

[leeye]

Some info on the COSC testing and certification.

http://forums.timezone.com/index.php...oto=1555&rid=2

And details on the position tested.

http://www.timezone.com/library/wbor...33384647656250

[Oceanklassik]

And I thought this thread was 'dead' until you revived it with the right information I've wanted

Tx v much!

[leeye]

And I thought this thread was 'dead' until you revived it with the right information I've wanted

Tx v much!

No problem at all. I had some time and was browsing thru some old threads.

Interesting to note the popular movements used and how some movements are equipped with additional jewelling, better quality parts (mainsprings, hairsprings, balance wheels, regulators etc) to improve the movement accuracy.