I know, that:
The official inquiry was dispatched by fourteen firms:
1) Douglas
2) Curtiss-Wright
3) North American
4) ?
5) ?
6) ?
7) ?
8) ?
9) ?
10) ?
11) ?
12) ?
13) ?
14) ?
Six firms have answered:
1) Douglas Model 593...
2) Curtiss-Wright Model ?
3) North American Model ?
4) ? Model ?
5) ? Model ?
6) ? Model ?
A little bit later there were three firms:
1) Douglas Model 593
2) Curtiss-Wright Model ?
3) North American Model ?
What can you add?
The official inquiry was dispatched by fourteen firms:
1) Douglas
2) Curtiss-Wright
3) North American
4) ?
5) ?
6) ?
7) ?
8) ?
9) ?
10) ?
11) ?
12) ?
13) ?
14) ?
Six firms have answered:
1) Douglas Model 593...
2) Curtiss-Wright Model ?
3) North American Model ?
4) ? Model ?
5) ? Model ?
6) ? Model ?
A little bit later there were three firms:
1) Douglas Model 593
2) Curtiss-Wright Model ?
3) North American Model ?
What can you add?