Originally a bicycle company making penny-farthings in 1874 under their original name: Bayliss, Thomas and Co, they later sold bicycles under the names of Excelsior and Eureka and changed the company name to Excelsior Motor Co. in 1910. In the early years of motor-bicycle manufacture they used Minerva, De Dion, MMC and possibly a Condor 850 cc single but went on to produce a wide range of machines with engines from most major manufacturers. In 1914, they offered a JAP-powered twin. A deal to supply the Russian Imperial government with motorcycles ended with the Revolution and Excelsior wound up with an excess inventory as a result.