A watch from India 🇮🇳, Hmt knowns as "Hindustan Machine Tools" founded by the government of India in order to provide watches to their people. This watch has been produced in the 1960's and has a HMT Cal. 0231 (could be a franken watch).
Info about the HMT Cal. 0231; here.
If you want to read more about the history of HMT; here.