Help Identify Netherlands Antilles Overprinted Postal Stationery

Hello,
I came across this cut square while sorting through some stamps from the Netherlands Antilles...




It is a piece of postal stationery aerogramme with Queen Wilhelmina facing left 6c brown violet similar to Scotts #132.

The stamp is overprinted in red "Nederland ==10== Cent"

Another mystery lies in the post mark cancellation 22.VI.14. The Scott's #132 series was first issued Aug 1 1936!

Any and all help appreciated

Also looks like it was postmarked in Eindhoven. Perhaps this is some sort of Netherlands aerogramme.

Rrogers, maybe this will help: http://dutchphilately.blogspot.com/...used-in.html
By the way, the year of usage is not shown in your piece - it would be opposite "Eindhoven" or on the bottom of the cancel


Peter

Awesome Petert4522
Thanks for the link. Very interesting