Bookplates by various artists but all for sale on the website of Thomas G. Boss Fine Books. Embarrassingly they are located within walking distance of me but I was unaware of them as far as I can recall until the last Antiquarian Book Fair here last fall. Images used with permission of Thomas G. Boss.

S. R. Shapiro bookplate (Ex Libris). American, by 1957. Designed by Bruce Rogers (1870-1957) who was a typographer and type designer. S. R. Shapiro was a New York City bookseller and noted Bruce Rogers collector. Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/shapirobp7.jpg

Muriel Alderman bookplate (ex libris). Undated, but Muriel Alderman died in 1952 so a few decades before that. 1920s-1930s maybe. M. E. Webb (Margaret Ely Webb), designer (1887-1965). Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/aldermanbp9.jpg
Hope G. Weil bookplate (ex libris). 20th c. American. Hope G. Weil was a bookbinder and perhaps designed this for herself. According to Worthpoint who has this bookplate on their website too, Ms. Weil was a bookbinder in New York City. Worthpoint link here https://www.worthpoint.com/worthopedia/bookbinder-tools-hope-weil-bookplate-503073164. Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/weilbp22.jpg
Bookplate (ex libris) done in 1887 for Volney Streamer, author and librarian of The Players Club in New York City. Schmedtgen, New York City, maker. Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/bp37streamer.jpg
D. H. McPherson Masonic bookplate (ex libris) printed on blue or grey paper. Undated, by 1917. American. Robert Sneider, engraver (1841-1917). Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/56mcpherson.jpg
Bookplate (ex libris) for Eleanor Lydia Johnston done in 1938 for a collection of Romantic Literature. John W. Jameson, artist/designer. Signed and dated J.W.J. 38 on the lower left. Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/65eljohnston.jpg

Bookplate (ex libris) printed in brown on tan paper. done for W.M.S. Engineering. 1898. Wilbur Macey Stone, artist (1862-1941). Signed and dated W.M.S. 1898. Image © Thomas G. Boss Fine Books. Fair use license. via https://www.bossbooks.com/bpimages/76wmstone.jpg