Patent No. 2092942, Martin E. Trollen, assignor toBrown & Bigelow, St. Paul, MN, a corporation of Minnesota,
Sept. 14, 1937
An example of this item, a whistle-thimble for the Cannon Metal Casket Company, sold on eBay today for US$42.00 after 15 bids, starting at US$5.51.
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