From (multiple) earlier discussions on this Forum.
I admit that most of it is circumstantial evidence, but still:
- Kutscha had two Dutch claims (triangels on his tail, see earlier Forum threat)
- Other sources also suggest both of these 10-5 over Ypenburg (idem)
- The German claims and Dutch losses over Ypenburg (for once) match pretty accurately
- There is no single un-matched loss of a C-5 over the Grebbeberg due to Bf110's.
All this makes that the two claims on May 10 over Ypenburg seem most likely to me. But I'm open to evidence if this is incorrect.
Regards, Pieter