With regards to your question regarding timing, our current range for a mechanical watch would normally be between -2 and + 3 seconds a day.That places them at 'twice' as good as the ubiquitous and actually quite tough COSC standard of -4 to +6 s/d.
Please do not hesitate to contact me should you have any further questions.
With kind regards
Thursday, August 24, 2006
Accuracy of Patek Philippe Watches
I contacted Patek Philippe regarding the expected accuracy of their mechanical watches and they were very kind to reply very promptly (within 24 hours).