Welcome back
the gun on top of B turret? I don't recognise that one. But yes, this should be a definitive Hood IMHO
That gun is not stricktly a gun, as it was the UP projector. The Up, for unrotated projectile, was a RN idea to stop low level and dive bombers by firing rockets that were trailing a wire. The idea was that the wires will be caught by the wings and propellers of the attacking aircraft,causing them to crash.
Needles to say the idea didn't work. Few ships carried these one of them HMS Hood and also HMS Repulse.
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Thank you Kim for the crest
"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"