Radiation Instruments, Inc. Model 111 Standard instruction bookwhat batteries

[tramore@bluemail.ch]

Made by precision Radiation Instruments, Inc. Model 111 Standard Has 

been setting on the shelf for about 22 years. 
     There is no instruction book and I have no idea what batteries it 
takes or anything about it.

Thanks for support

Charl Frey
RPO 

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