Pinch Hitter or Night Watchman?

We see a lot of pinch hitters coming at no.3 when team need to score at higher strike rate. But it will be surprising to see who has started it? I remember one incident in 1989 India hosted Nehru Cup. In 9th match of the series at Kanpur against England, India won the toss and put England into bat. England scored 255/7 in 50 overs. It was tough score to surpass then. India had lost both the openers, Raman Lamba and K. Srikanth at the score of 65. With asking rate climbing over 6 it was very difficult situation to reach to the target. But with all surprises Captain, K Srikanth sent Chetan Sharma at no.4. Commentators were all in surprise. They didnt have word even for this situation. They knew that lower order or tailender batsman coming at no. 3 or 4 would be called night watchman in tests. But they didnt had a word for ODIs then.

Proving his captain's trust, Chetan Sharma scored his 1st and only ODI century and take India to home. In 1989 strike rate of about 75 was considered good but Chetan Sharma scored his 100 in just 96 balls and guided India to a victory.

I think this was the first ever incident when pinch hitter was used.