antique stained glass table lamp

hi....this lamp has been in my grandmothers house ever since they were married (1909). It is absolutely gorgeous. The base has the maker as M B Co. 87 usa. We don't know what company made this lamp, but would like any information someone could give us. The lamp is perfect in all respects. It is embossed with continuous rows of raised flowers. It stands 22 inches high, and the shade is 19 inches wide. The flowers serpentine down the base. The lead is perfect in form and character. Thanks for looking! Any help will be appreciated. Tony