Apologies for digging up this old topic. I believe this article is a good read and valuable adition to our knowledge of the subject. It is written by renowned specialist P. C. Boer.

http://www.cortsfoundation.org/index.php/2011-12-24-11-04-24/88-douglas-db-7b-bostons-of-the-dutch-naval-air-service

Cheers,
Edwin