Thank you all for the reply's and help!
In attachment pictures of the dipstick and the pulley.
I don't have a picture of the inside of the thumb pull, but when reading the explanation of Bob it must be a later model...
The short bent 'L' handle isn't broken or cracked.
When looking closer (picture 2) there is an other kind of blue just under the lit.
Don't know if that is closer the the term teal ?
But obviously it has been painted afterwards, the inside of the bracket is indeed covered in blue paint.
The tag has been painted over and at the backside it is just bare metal.
Thanks again for all your help!
kind regards,
Jeroen