Yes, the Indian replicas were sold as the K-149 (Kumar) in the 70's. It was my first engine, and my first diesel. The cylinder muff was anodised red like the original, and the overall quality was excellent. I had no problem running it on equal parts of Kerosene, Ether and Medicinal Castor. I had bought it for C/L use but never got around to it and eventually sold it to Rishi Kumar. I still regret that decision! Incidentally, there was also a K-150 diesel although I am not sure whether it was based on the Frog 150 or the AM 15.
Sorry for drifting off topic a bit, but it surely brought back some fond memories!