Fair enough, I get the one a month thing, that makes perfect sense, not getting delivery until months later when there are free slots, you could have used seems a bit stranger!
Maybe the specific model you ordered wasn't available at those early dates. Which type are talking about?
Exactly, if you mean something like this:
That's because the f200 delivery starts july 14th.. since both model share the same production line (same fleet), it gets full once the more popular f200 starts its deliveries...
now, if you order a f200 you'll go at the end of the list (1960), but AFTER that you order a f100, I suppouse you don't fill the green previous slots, but you are put at the end of your own order... if anyone could confirm this it would be nice
If you don't have any previous orders in that line, and you order a f100, you get one of the free green slots... (if I place and order now, I get this delivery date "Delivery at 21-Mar-1959".)
If I order one of each models, then I get this scheme:
Fokker F.27 Mk 100 Friendship
Delivery at 21-Mar-1959.
Fokker F.27 Mk 200 Friendship
Delivery at 08-Mar-1960.