The photo of 1933 looks clearly manipulated even if they repeat several times "trust me, obscure authority figure said that is not".

Well; Is easy to spot a curve in the object that continues in the ocean disguised as waves. It lies too high and the contact between the object and the water is unusually regular and quiet.

Looks like a stuffed animal with four clamps used to fix it to a wood piece (that would explain why is floating so high).