Law Battery is listed as being charted in 1923 even though a 1924 ad claims "since 1913" ¹

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Providence Journal March 9, 1924

Click to enlarge Radio World August 1922 Click to enlarge Providence Journal April 16, 1922 Click to enlarge Pawtucket Times January 30, 1925 Click to enlarge Providence Journal February 1, 1925 Click to enlarge Providence Journal January 27, 1926 Click to enlarge Pawucket Times January 29, 1926 Click to enlarge Providence Journal March 6, 1926 Click to enlarge Providence Journal September 26, 1926 Providence Journal May 24, 1929 Click to enlarge Providence Journal October 12, 1930 Providence Journal February 13, 1930

¹ Providence Journal December 20, 1930