細節
Beck, Watson, Baker and Cooke:
R. & J. Beck (Philadelphia) two catalogues, circa 1880 and 1884; W.Watson & SOns Ltd., catalogues , 1913, circa 1934 and Metallurgy section, 1927; and sixteen later catalogues and pamphlets for Cooke, Watson, Baker, Beck and Prior
R. & J. Beck (Philadelphia) two catalogues, circa 1880 and 1884; W.Watson & SOns Ltd., catalogues , 1913, circa 1934 and Metallurgy section, 1927; and sixteen later catalogues and pamphlets for Cooke, Watson, Baker, Beck and Prior