Gents/fellow obscure aeroplane people
A million thanks for this one - the aircraft and sub had eluded me completely. Even if I had seen the Quiz in time, I'd have been lost for an answer. But what a completely bizarre lump of military machinery.
It's the sub, in some ways, which stuns me more than anything. Displacing some 6,500 tons that's only a gnat's short of RN's forthcoming Type-45 Destroyers (7,000 tons). Okay, it is only about half the displacement of USN's Ohio-class SSBNs but it is half a century earlier in terms of materials and systems technology.
Only pix of I-400 of IJN revealed by Googling are poor and unclear. Will try to find something better (I have my sources) and post it here.
Again, thanks - b. amazing