A. Lange & Söhne

I have an opportunity to acquire a Lange 1 Time Zone in rose gold, black dial, with 'Singapore' in place of the usual Hong Kong on the city ring. I understand it was created to commemorate Sincere Watch Co's anniversary back in 2006, but it is not immedia... 

I researched this same issue awhile ago to try to make the online historic data table as accurate as possible. I came up with 15 of each (the 116.031B "Singapore" and the 116.031C "Kuala Lumpur") BUT now I have reason to believe that there were 25 pieces ... 

.... Kudos for the incredible effort in maintaining the list! And yes, I did refer to it while trying to solve this puzzle. I have also approached the Lange customer service, hope they are willing to advise. Will provide an update if I get any news.

.... The kind folks from Lange were kind enough to look into this matter, and have advised that 30 pieces of each version (one with 'Singapore' and one with 'Kuala Lumpur') were crafted. It is, strictly speaking, not a limited edition as the numbers were ...