Manufacturer: Excelsior Motor Co., Ltd., Birmingham, Anglia.

In the history of motorcycles, four companies have used the name Excelsior to denote their products. They were: firma Excelsior Fahradwerke z Brandenburga (producing motorcycles from 1901 years to the Second World War); the small company Excelsior from Munich; Excelsior Mfg. & Supply Co. z Chicago (the largest manufacturer of Excelsior) i, finally, the english factory of Excelsior Motor Co. z Birmingham.

The English Excelsior factory, belonging to the Walker family, started producing motorcycles already in 1896 year. Initially, it installed engines from well-known manufacturers in its frames, such as Minerva, De Dion-Bouton, MMC.

In the 1920s, Excelsior's production program included motorcycles with a capacity of 98 cm3 do 998 cm3 equipped with propulsion units of own production, as well as Blackburne, Villiers and JAP engines.

The victory in the Tourist Trophy races in 1933 year, in which the company was represented by Mechanical Marvel class racing motorcycles 248 cm3. Their designer was H. J. Hatch.

The model pictured was part of the Manxman series, known for its great capacity engines 248 cm3, 348 cm3 i 498 cm3. FR symbol 12 meant,that it was a special model” with OHC single cylinder engine, of a capacity 348 cm3 and power 28,7 kW (39 KM) at 7500 rpm. The design peculiarity of the engine of this vehicle was the bronze cylinder head. The carburetor was from the Amal company and was marked TT 34. The engine had a magneto ignition system (BTH magneto) and circulating dry sump lubrication. The drive from the engine was transmitted by a dry disc clutch and a four-speed gearbox by Albion (with gear engaged). The front suspension uses a Webb swing fork, the rear wheel was also flexibly suspended. The motorcycle weighed 155 kg, It is therefore equipped with effective brakes from the well-known Girling brand. Model „special” was reaching maximum speed 172 km/h.

After the Second World War, the Excelsior company focused mainly on the production of motorcycles with Villiers two-stroke engines, and also with its own three-cylinder in-line engines. W 1964 In the year, the production of motorcycles was discontinued.