If the transom stickers are missing AND the powerhead sticker you would need to ask yourself why that is ? It's highly unlikely both stickers on the transom (port/starboard - above the waterline) and the third powerhead sticker would "fall" off.
FYI , I've a stolen/recovered F115 here with both transom stickers removed - but even on that the powerhead sticker is still present as not everybody knows what it is or where it is.
Do you know it's history ?
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