Very cool story, would be interesting after all these years to see if any silver can be found on days such as that.
Here's a different take on shipwreck coins. See the pics. It's a Russian 5-ounce gold bullion coin minted in 2014 and denominated as 1000 rubles. Reverse shows a couple of Russian ships taking down a Swedish ship at the battle of Gangut in 1714. Good luck if you want one; mintage was only 250. Cal
To the best of my memory "Shipwreck Effect" first appeared on the SS Republic salvaged coins and later spread to other sea salvaged coins. Most of the 'Shipweck Effect"SSRepublic coins I have seen appear to have been scrubbed with a brass wire brush.
I'll bet someone put "Pulled out of Manila Bay" on the 2x2 just so someone would think it was part of the Philippine Treasury that was dumped to keep it out of the hands of the Japanese. McArthur withdrew from the islands in 1942, and the Japanese occupied the Philippines from 1942-1945. Chris @Hommer I posted this before I read the rest of your posts. No offense intended toward you or your brother. Chris
My brother (who is one week less than a year younger than I) was on the Eisenhower at the time, befriended the cook who was Filipino. He said every cook on every ship he was ever on was Filipino, hence nearly every meal was called Flip Surprise. Anyway he with the cook as a tour guide, explored the Islands. Another piece of History, Manila Bay wasn't the only place they dumped the silver Pesos, it's just the only one the Japanese found.