It is common for Indian locks to copy the style of quality British locks, and to to carry versions of the genuine marks.
However, as the indian craftsmen commonly did not read english, they copied english lettering as one would copy a picture, without understanding the significance of the marks, nor of any change. Accuracy of copying varied. Chubb locks, especially padlocks, were another target of the copiests. Some copies (from a 4 lever model) have been marked '40 lever', a clear indication the stamp could not be understood.