The range expanded quickly and included models with a wide range of capacities: from Blackburne; JAP; Bradshaw; Barr and Stroud; and Wiseman. All had Burman gearboxes and the frames and forks were conventional.
1923 Late in the year they adopted a new universal frame for all models with the tubing formed to avoid all but one joint, which was welded rather than brazed and lugged.
1925 Production came to a close.
Note: When production ended, the name of Sirrah had already found its way onto a number of special purpose machines, including an inspection trolley that could run on South American railway lines. A similar device that could run on road or rail was also produced for the Indian railways.
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