Hi ptyron, Best of luck on your search.do you have any photos for example?
Looking for vintage or 1999s 2.25 Drueke's board. Paying premium
That is 1999s I think. I have another few I found here as other people posted theirs and they best are around 2000 as far as I saw. 
And another one with round edges tho I am not sure if this is from 2000s or new Bill's as white squares are not that marble like like on previous two photos. 
If you are buying the regular Noj 1950 Dubrovnik, then I’d actually recommend a 2” square board.
If a 2” square board is your decision, then the JLP board from ChessHouse is arguably even better than a vintage Drueke!
Thank you VBerriz. There is something special about Drueke 2.25. I personally like my pieces to have more space on the squares. I never owned any board so far but many people have sent me different boards and pieces and that is why I think 2.25 is my first choice so far.
Completely understandable! If that is what you like, then you should definitely pursue a 2.25”.
I own both, and my preference is the 2” - here is the photo. By the way, these boards are quite large, make sure you sketch out on cardboard how big it really is!

Thank you for the photo. I will def. go for 2.25. It gives more space for pieces even though my Dub 1950 ( NOJ ) looks smaller set than yours on this photo.
What year of production is this one ?
These boards are lovely. True battlefield for the mind.
They are large and I honestly really do not know where I m going to store it when it is not used.

After 7 days of search for a board that will be support for my upcoming Dubrovnik 1950 by Noj, I came to conclusion that I want vintage Drueke or 1999s in good condition. 1999s has those marvellous marble like squares in compare to new Bill's Drueke. ( thanks to @RuFour86 for explaining this difference to me in great details )
Also not sure which Drueke has rounded edges and I would prefer that one.