Measures for top try of Wegner AT48 wagon  

If you cannot find measurements, you should be able to estimate dimensions fairly accurately by studying images available online. Perhaps the the most technically challenging aspect of reproducing the tray would be routing the recess in one side. The rest seems relatively straightforward, assuming you can find and afford acceptable teak lumber. Welcome to the forum and good luck!

what do you mean for "recess in one side" ?

Many thanks for your answer

Images of AT 48 tables I see online have a shallow depression or recess in one side of the removable top.

yes I saw it, and immediately thought it was the most difficult part, together with the rounded shape of the edges. Many thanks for your help in the meantime, I hope someone will post the measures

I would second tktoo2 here. You can see the dimensions pretty well from the photos. If you have to make it from scratch, I don't think it really matters if has the exact same thickness or length, anyway, as long as it looks like the original. And it will. Maybe you make a drawing before you start.  

Indeed, Herringbone. The goal is not to get crazy to reach the level of the original one, but to end up with a piece with no major optical defects. I hope I can post a picture whenever this project finishes, might take really long...

Would love to see pictures when its finished.

Do you have any link to a shop that sells wheels with such fit ?

would a top try made out of oak, instead of teak, make any sense ? I see no original pieces were made with oak/teak mixture, although the contrast works in others cases (Mogensen).