Glasmurmeln
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OBERMARTIN STUDIOS

Signature: Artist Mark "OM"

       

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OBSIDIAN CLIFF STUDIO

Signature: unknown



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O'GRADY, George

Signature: unknown

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O'GRADY, Kevin

Signature: Signature Cane with name and year


     

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OKAMA, Akihiro

Signature: "AKI" and year

  

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OKUMURA, Takehisa

Signature: unknown


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OLSEN, Robert

Signature: unknown


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OMURA, Yoshio

Signature: unknown



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ONE HAND JEREMY

Signature: unknown



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ONO, Ryo

Signature: "Ryo"


  

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ORB GLASSWORKS

Signature: unknown


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O'SHEA, Jim

Signature: unknown

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OSMON, Bradley

Signature: unknown



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OXTON, Rachel (the Glass Cavern)

Signature: unknown


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