Vintage "Check Protector" Encryption Device for Personal Checks c. 1960s For Sale

Vintage
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Vintage "Check Protector" Encryption Device for Personal Checks c. 1960s:
$4.98

Vintage "Check Protector" Encryption Device for Personal Checks c. 1960s.Please see all photos above for details. Please email with any questions. This came from an old estate in San Antonio Texas.Thanks for looking!
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