Anyone know what Vulcabeston is?

In 1895 the H W Johns Mfg Co. people (later Johns Manville) attended a convention at the Thousand Islands, NY, and gave out as advertising gifts poker chips with the company name and its products -- 10 different designs for 10 different products. See picture below. One of the products is Vulcabeston. I can't find out what it is in a Google search, or an encyclopedia. I even emailed the John Mansville information officer, and he doesn't know!!! Do you?

Clue: Vulcan
n : (Roman mythology) god of fire and metal working; counterpart of Greek Hephaestus [syn: Vulcan]

More info in my auction:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6214530830

Robert