Five 5-digit production line instruction codes follow the option codes on hood stickers and build sheets. The two that matter for provenance: 09981 = car was physically diverted off the line to the Exclusive Department for finishing; 09991 = X-options were installed (and if 09981 also present, on the Exclusive line, otherwise on the regular line). …
Production line instruction codes (5-digit) — Exclusive routing visibility
Porsche 911 (993) · factory-spec