Next time I will choose animals.

Because all planes were available at Holland Casino Schiphol, I looked in that direction.
It seems that all planes have been used at Schiphol, the biggest airport in the Netherlands.
The logic tells me to go for European planes also.
I found an enormous amount of information. It would take me weeks and weeks to go through this.

Wikipedia:

"In the Netherlands, the first DC-3 was delivered to KLM in 1936. The aircraft was named Ibis (PH-ALI); At the time, KLM named its aircraft after birds, the first letter of which was the last in the registration. Before the war, KLM bought a total of 23 aircraft of this type. The DC-3 made it possible to increase the frequency on the line to the Dutch East Indies from two to three times a week."

I’m not an airplane geek, so I will leave this subject and as usual you can always use the UPDATE box to inform me if you think it should be another airplane.

1: Hawker Siddeley HS-121 Trident

2: Fokker F IX

3: Douglas DC 3

4: Avro 504

5: Spitfire

Learned a lot about planes the last couple of hours, LOL.
Jo from Belgium.