[Matt Monson]

There were spare unnumbered cases for sale. It was handled inconsistently. Sometimes the new case was stamped with the number and it was documented by Porsche. More frequently the blank case just got built up. The original case was usually just sent to the scrap yard. Nobody cared about provenance back then. I've even seen instances where 72-73 era cars got 2.7 cases as replacements when their original case went bad. The thinking was the new version had to be better. S meant nothing in those days.