models of altitude and azimuth instrument (Ram Yantra), scale 1:24 (two models each complementary to the other) in the Jaipur Observatory Model of Ram Yantra at Jaipur Observatory, 1884-1886
model of sundial, similar to Samrat Yantra, scale 1:24, in the Jaipur Observatory Model of Samrat Yantra at Jaipur Observatory, 1884-1886
model of Azimuth instrument (Diagamsa Yantra), scale 1: 24, in the Jaipur Observatory model of Azimuth instrument (Diagamsa Yantra)