USED ONLY 17 tooth 1st motion shaft.
It has Pre A+ teeth but uses the A+ mainshaft(18mm nose). we only have "USED" secondhand gear sample available--no warranty
It is the early "A+" type and was only fitted for a short while(1979-1981) before being replaced with A plus gear pattern which should have a one groove marking all round the teeth.
The A plus gear is
DAM4930 which also had 17 teeth but with groove marking on teeth