Some information on what to look for with the 964 and 993 Turbo and RennSport cars.
Useful site for decoding VIN numbers: https://en.vindecoder.pl/
Articles: 964 RS & RS America; 964 Production numbers; VIN Decoder; 964 RS & Cup VINs; suchen.mobile.de
Example VIN for 964 Cup race car (1991): WP0ZZZ96ZMS409015
Example VIN for 964 Cup race car (1992): WP0ZZZ96ZNS498080
Example VIN for 964 RS road car: WP0ZZZ96XNS490100