Datamp.org Patents https://www.datamp.org/ Recently added patents en-us US Patent: 1,810,108 https://www.datamp.org/patents/displayPatent.php?id=27953&pn=1,810,108 Tools in Sets and Holders Therefor Patentee: Willard C. Kress - Kenmore NY Granted:1931-06-16

The components are shaped to provide "non-rattling" grip while allowing for variations in size, etc. This holder appears to correspond to WILLIAMS "Volume" wrench sets, introduced ca. 1929. Fraser, Myers & Manley - patent attorneys
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