Great pictures. Funny how Bosch allowed that degradation of identity stamp on the later pump. Generic body compared with specific batch production on the n/a. The TD is rated @2250rpm, whilst the n/a @ 2400rpm. As a pump novice, I wonder if that means the governors were different, or even advance rate? It would make sense as an n/a has to operate at higher rpm to get sufficient power. Maybe n/a body with TD head, gives best high range
i guess id need to tap an out bolt and put a pressure gauge in it for this? i have a yellow dot pump