Pagoda VIN numbers might more reliable than engine numbers. VIN numbers never change while engines can come and go. Of course a Data Card can be of help here.
According to Gunter Engelen, (had access to Pagoda archives), the first 230SL with auto transmission had VIN number ending 000600 and was built 07 Oct 63.
The first Pagoda with an "Automatic" badge had VIN ending 007205, built 23 October 1964.
There was about 1 year from the first Automatic tranny until the first Automatic badge. The first production year auto tranny Pagodas did not have the badge.
If the VIN of the "200th" automatic 230SL ends below 000600, then it was not fitted with an automatic badge according to the source cited.
Richard M, NYC