Very interesting, thanks all for the input.

Can anyone speculate as to the likelihood of this coming from a wreck (I believe a Mk 3 crashed into the Moray Firth in the ’50’s or ’60’s) or parts that may have been dumped at Kinloss and that have since found their way into the sea?

Edit: Crash date Dec 1965, only Shack to have been w/o over water in the near vicinity.