Unusal German bomb marking

[Grzesio]

I've encountered a picture of C 250 class bombs with very unusual colour markings, I've never seen before.
What could they be? Red rings denoted incendiary bombs, white nose - practice smoke bombs (or white nose with adjacent longitudinal stripes - smoke bombs). But bright colour rings?
The only similar marking that comes to my mind would be a KC 250 chemical bomb with Gruenring Gelb filling, i.e. with adjacent green and yellow rings - but I do doubt it's the case here...
Or maybe these are captured German bombs with foreign markings?

Do you have any ideas?

 

[Antoon]

I think it is the KC 250 with one green and one yellow band on the body. It should be filled with Gelbkreuz (S-lost)

 

[Bellifortis]

It would be interesting to know where this picture was taken. It looks like field-storage. As far as I know Germany did not use gas in WW2. There were filling-stations and bomb-storages inside germany, most of which got dumped in the North-and Eastern-Seas by the allies at the end of the war.

 

[Fusse2004]

Hello Antoon! can you adjust the picture so that you can enlarge it?