Great engine - the exhaust "funnel" is a condenser - very nice item.
On the t-part there should be a cap - but that should also have the
same Marklin thread - I remember the size is close to 8x1 mm. Very
strange that you can not remove the whistle/gauge - how was it fixed
to the t-part once?
A very nice and rare engine - just fantastic.
Congrats,
Arnold