Calvert of Stoke Newington, London produced motorcycles from 1899 to 1904.
This short-lived firm built basic, primitive machines using their own and Minerva engines to produce simple and cheap motorcycles. Their model for 1903 was powered by a 2¾ hp or 3¼ hp engine. A forecar model had its single rear-wheel driven directly by chain.
Report from the 1902 Stanley Show
Stand 5-6.
Calverts Motor Cycle, Ltd., Kingsland Road, N.E., show various novelties and sundries connected the motor industry. Two motorcycles are on view, both fitted with a Calvert engine of 2.25 horse-power, and weighing 110 lbs. There may be seen special trembler coils for high speed engines, one giving forth a spark over 0.5in. long. Among the items to be seen are two-stroke petrol engines for motorcycles and cars, giving 3 horse-power at 1,200 revolutions per minute.
Motor Cycling, 26th November 1902
Source: Graces Guide