You do not need to find identical to identify it !! I did look at some which were almost the same but I forgot what search term I used !! The legs on your table are exactly what I would expect on a table from this period,, very finely styled !!
The difference in measurements you mentioned would be the shrinkage of the wood from age,,not because they were not made correctly !! And not all would shrink at the same rate !! The period craftsmen were quite good and masters at woodworking !!