PANERAI Historic Vintage RADIOMIR 3646 with Rolex Movement & Signed Case Back | eBay
Here is one of the known first rare ancestor of the current Officine Panerai RADIOMIR, A 1930’s ROLEX 3646. A large Rolex Radiomir case Ø 47mm, with a Cal. Complete with serial number. This watch is one of the earliest examples of a Panerai watch dating back to the 1930’s.
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And because you've got two wrists, he's got another!
PANERAI 6152/1 Spectacular Vintage Historic Military Watch W/ ROLEX Movement | eBay
This watch is 47mm and dates back to the 1950’s. It has a signed case back “Montres Rolex SA”.
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I'm far from an expert on these models, but I can't imagine someone with a half a million dollars in wristwatches is going to use Ebay and Priority Mail to sell them...