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John Bardeen signed card-real or fake

Hi guys, I ask for opinions on this John Bardeen signed card which is sold by a German autograph seller called 'Eberhard Köstler Autographen&Bücher oHG' on abebooks, Anyone heard of them? I am interested in collecting autographs of scientists and John Bardeen is a famous physicist who was awarded Nobel Prize in physics twice. After my own research, I think this one is genuine, But I ask for your opinions. Thanks!

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Permalink Reply by Tobi on April 16, 2022 at 9:48am

Hi,

I think it is genuine (I got a signed photograph from Mr Bardeen).

For my collection of autographs from scientists in the surrounding of the development of the atomic bomb, I bought an autograph from Mr Köstler. He is very trusted.

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Permalink Reply by X Karl on April 16, 2022 at 10:08am

Thanks! Tobi.

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Permalink Reply by X Karl on April 17, 2022 at 8:42am

Tobi, I found another Mr Bardeen's autograph on ebay yesterday, which is also sold by a German seller called 'wykfoehr01'. I once bought a chen ning yang signed card from them. They are top seller on ebay. This Bardeen signed card is odd to me but I think it could be genuine. I sent it to PSA for a quick opinion and the result is 'likely not genuine'. I ask for your opinion.

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Permalink Reply by Tobi on April 17, 2022 at 9:04am

I don't know this ebay-seller (I am from Germany too) and also don't like the signature.

A Bardeen is a rare, but not very expensive autograph.

If you want a nice one, try this signed photograph. I had bought it long ago from Markus Brandes and after I sold it, this autograph has been offered by German seller Kotte:

https://www.kotte-autographs.com/de/autograph/bardeen-john/#19537

Tobi