dctyke,
Interesting that something like that should turn up on ebay. I say that having been the Mess silver member at Benson when 78 Sqn reformed there, so I had the inventory of what we had in the Mess.
A few years back, the rules on Mess property changed and if Messes wanted to get rid of items that had been donated, then they had to jump through various hoops, one of which was to go back to the original donor or their next of kin and give them first refusal. That change of rules put the skids on our plan to 're-cycle' much of our old and damaged silver into a shiny new piece as there was no way we had the time or resources to comply with such a rule.
That this piece has ended up on ebay suggests that either it has gone back to Wg Cdr Harrison's next of kin, possibly 'snaffled' from sqn / stn silver store or forgotten about at some point over the years, most likely during a move or disbandment. Not sure there is much that can be done about it, just a shame to see current Sqn silver being sold off to the highest bidder.