I'm not so sure the ol' Jetstream can be called a "
modern twin turbo prop".
Well, compared to, say, a Fairey Gannet...
Only just !! Have a look at the years of service of the Gannet, I first flew the (then) HP Jetstream in the mid 1960s. Collins (UK) had one as a flying testbed, which succeeded their Percival Prince.
Tootle pip!!