Need info on 1983 Silver Vatican 3 medal proof set Anno Santo, Roma

Never seen these before, but that doesn't mean much

Any info would be appreciated.
I found one on Ebay, but they say the reverse are blank Link Here




CoinsAreFun Pictorials Album
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CoinsAreFun Toned Silver Eagle Proof Album
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Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
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More CoinsAreFun Pictorials NGC
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CoinsAreFun Toned Silver Eagle Proof Album
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Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
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More CoinsAreFun Pictorials NGC
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Comments
added: The link you shared has a fair amount of other info about the issuer, seems reasonable and about the most info I've seen on this sort of thing.