Thanks Adam
Very nice He 59 image!! Are you sure the He 115 really do carry digits on its fin? Now we have THREE He 59, 170, 176 and 177 and it really looks like we have a sequence 170 to at least 177 on our hands!
I checked Roba's book again and located on page 48 a He 60 with something that looks like 4xx, ie in the 400 digit range, but that is the only photo I can find showing these elusive digits. Roba's text is very hesitant and is useless to deduce unit etc...
So far everyone publishing a photo of an aircraft with these digits avoid even mentioning they are aware of the numbers. No doubt they haven't a clue what they mean....
Seaplanes
Where are you???

Would be very nice to have your input!! Anyone else?
Cheers
Stig