never heard of it. where'd you get it? I've only ever seen Antoon, Cuve and the normal DK around. what strength? what's it like?
edit:
i think this is just the normal "De Koninck" - you confused me with the "1833" thing, I never noticed that on the bottle.
There are a few clone recipes for this around, I think there's one in Brew Like A Monk but I'm not sure.
like an altbier grist with saaz and belgian yeast.
I did one last year involving bohemian pilsener malt, bit of caramunich and a pinch of chocolate, 35IBU of Saaz, Bastogne yeast, 1055 or so, CC'd for a month, and it came out very nice.