John E. Guitar Posted October 20, 2022 Share Posted October 20, 2022 Link to comment Share on other sites More sharing options...
John E. Guitar Posted November 4, 2022 Author Share Posted November 4, 2022 A comparison of sleeve manufacture - 1913 vs 1928. A tenfold increase in productivity with the newer lathe. Je Sais Tout magazine - Issue 274 October 1928. Link to comment Share on other sites More sharing options...
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