Originally Posted by
uncle uncle
That would be only the 1985 Ironman. The 1984 Centurion Comp TA also used that proprietary shifter braze-on.
Shimano called it the
Brazed-on A Type, the standard shifter mount in use today they called the
Italian Type, and the aero shifter mount that screwed into the top of the downtube was called the
Brazed-on B Type.
Shimano 6207 shifter sheet for 1984