This is what the two gear stacks look like out of the case:
I have found out that all synchros (and probably the dog-teeth) have been replaced not too long ago(!), but that both gear-sliders ($$) are seriously worn. Also the dog-teeth of 2nd seems to have a liitle bit too much rounded teeth, so this will be replaced as well together with 3rd synchro because of markings on the outside and 1st gear brake-band.
Its amazing, but I have been almost cured of 'tranny-fear'
When the new parts have arrived, I will update the build-up again.
Best regards,
Walter