Jamnagar The Jewel of Kathiawar The modern look of the city was initially given by Jamsaib. He was instrumental in building the modern infrastructure of the city during his reign in the 1920s. Thereafter, the city was substantially developed by Jam Saheb Shri Digvijaysinhji Ranjitsinhji in the 1940s, when it was part of the Princely state of Nawanagar. The city lies just to the south of the Gulf of Kutch, some 337 kilometres (209 mi) west of the state capital, Gandhinagar.