One new EPC brand variable load heavy duty 12 volt 32CP flasher unit, part number 569 or Bosch # 0.336.256.002 or 33.051.  This fits:

VW Type 1 Beetle & Super Beetle 08/1966 - 1979

VW Karmann Ghia 1964 - 1972

VW Type 2 Transporter 08/1966 - 1975