I've just checked my pics again from 9-9-2008, which showed a Sea Lynx (so not the newer Super Lynx model!) model '83+54' (so not 83+55!) with a c/n 540 on its tail. A c/n (line number?) plate was found on one of the panels as S2/WA/582. On another panel inside the engine compartment the serial 83+07 was written with '07' in a handwriting, and marking the serial numbers of the 2 engines. I will try to add some pics here later on.
Scramble however does not record any 83+54 and the c/n seems quite off from the original batch Sea Lynxes (roughly between c/n 220-345) and the Super Lynxes (roughly between c/n 388-429).
I also found these online pictured by Nils Berwing in 2018, clearly showing these are 2 seperate GIA airframes and not the same one!
https://www.jetphotos.com/photo/8831042
https://www.jetphotos.com/photo/8831064
So who can provide more info on these 2 queries?