Perforation Shifted Errors -India Commemorative block of 4-rare and interesting-read description

1980. Re.1.00 marginal block-Apiculture conference-perforation shifted to left cutting the Hindi words.Interesting point is that 2 stamps on right row are smaller in size by 2 mm than normal .Hindi words "Sammelan" is cut from the middle in right row,Where as in left row, only last alphabet is cut.