It never hurts to say please and / or thank you when making a query ; introducing yourself, especially as a newcomer to the forum helps to break the ice and people would be more inclined to share their horological knowledge.
As far as 2499 is concerned, these are apparently made over 4 series, majority in yellow gold; first series is supposedly the rarest; and its considered exceedingly rare in rose gold (perhaps no more than 4 are known to have been offered for sale); actually the last rose gold 2499 sold at a Christies auction for $2.7 million
The exact production numbers are perhaps only known to Patek Philippe; the rest is just speculative.
Hope this helps.