Yes....., to start with. The Indian Army generally followed the pattern of their former British Army heritage until well into the 60's/70's when the old equipment was becoming worn out. Thereafter I would assume that they would have adopted a local pattern of sling or just continued the tacit UK military pattern of using the longer and more versatile Bren sling without the hooks. Certainly in the 70's they were still using vast amounts of UK wartime Bedford, Austin and Commer vehicles