Heinkel He51 trainers

[obdl3945]

Hi,

Would anyone be able to shed some light on the aircraft via this link?

http://www.heimatmuseum-oberschleiss...1921-1945.html

Once the page shows, please tab along (11 times!) to the right until you arrive at the image of the He51.

The nearest has a partial Stkz code under the wing and a number on the fuselage. Could anyone provide code/number details, and the colour of the number? Aircraft '4' (to the rear) and '7' (extreme left) are also shown. Any information on those would also be appreciated.

Presumably being trainers, I take it they would only have one shade of dark green applied? Can anyone advise the likely colour of the spinner... yellow, perhaps?

Sorry for all the questions, but trainers aren't my strongpoint.

Thanks for any help that can be offered.

Regards,

Paul