I recall being told that the Colonial grade was intended for general export . There were guns marked as the Colindian and the Coladian for the Indian and Canadian markets . I dont think there was Colyanky .As to the non ejector ,if its old enough it may have been made before ejectors became standard and was one less thing to go wrong in a far off land ,Add to this the simple fact that cartridges would have been reloaded in brass cases there was no need to have ejectors and risk losing the cases.