Hi Bernard,
Explanations of the VIN numbers of our cars are all over the web.
I don’t quite understand your statement, 230SL from 1624, they only started building them around 1963.
113 is obviously the Pagoda designation and 042 the 230SL, 043 the 250 SL and 044 the 280SL.
The 7th digit is 1 for LHD and 2 for RHD , the 8th is for manual and or auto. So a RHD 280SL Auto will be 113 044 22. The next 6 digits are the sequential chassis numbers.
Therefor the number, 113,042 is a 230SL BUT 50xxx does not make sense. This is not the Vin number or Chassis number. It could be a body number or a paint number.
Regards
Chris