i believe there's a WWII minelayer that drachinifel or ryan szymanski (curator of battleship new jersey) did a tour of, that got coverted to being a personal yacht at some point after the war, that they were in the process of reconverting to her wartime config.
it actually seems to be pretty common in museum ships to "backdate" them, or rather, pick a point in their history to represent, unless they went straight from commission to museum status. if they had a short active span, then they went into mothballs, a good chunk of their equipment getting taken to use on fresh ships. and if they had a long service life, they had a lot of changes, and not all of them uniform...
it's not too unreasonable to think that the STIV Saratoga got refit into a similar configuration as the later one, then later decommissioned and a fresh ship in the same class and configuration built...