Hekto-Printer gelatin transfer duplicator
Hekto-Printer gelatin transfer duplicator, by Heyer, Inc.
https://franklin.library.upenn.edu/catalog/FRANKLIN_9977255992003681
Hekto-Printer gelatin transfer duplicator, by Heyer, Inc.
https://franklin.library.upenn.edu/catalog/FRANKLIN_9977255992003681
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