A panic in 1837 caused the glassworks to shut down and it would not be until 1845 until James Bryce would return to glass making.
WEB PAGE; Home / Crystal / Bryce / 670 (Diamond Optic).]
The glasses shown are typical of Bryce's many variations of basic patterns in their early 20th century, deco designs, which they produced by mixing their many blown glass bowls (with many bowl patterns produced in both non-optic and various optic patterns) with a variety of their playful molded deco stems, with some of the stems being produced in many lengths and widths to suit the function of an attached bowl and to create deco drama.
[Sources for this latter info are Replacements Ltd. and my own experience of studying and collecting Bryce's MCM, Deco glass.]
In 1850 James formed his first business venture along with partners with whom he was senior, named; Bryce, McKee & Company.