Tinker was a Chicago-based firm specializing in the promotion and distribution of American Brilliant Era cut glass manufactured by smaller cutting houses that elected to "outsource" their marketing and sales. The firm claimed to be the "largest cut glass sales agency in the world."

The Brilliant Era Tinker catalog reprinted, indexed and analyzed here was published during the first few years of the 20th century. Some of its content was earlier distributed as the third chapter of the limited distribution 2002 LABAC Cycle #3 "GWM" book. A second edition of GWM was published by LABAC during 2005, but that bookwas sent only to LABAC participants (ISBN 0-937508-03-9), and has long been out of print. Produced for LABAC Cycle #22 Brilliant Era cut glass enthusiasts, this eBook presents fresh information not available elsewhere.