Comments on Grantha OM

Mr. Ganesan has shown a sample image for Grantha OM in his document “L2/09-345”, and further delineated the glyph in his document “L2/10-053”, with an additional image. The glyph identified by N. Ganesan forms as a part of collage of various others OMs. They do not unambiguously identify it as belonging to the Grantha Script. It should be noted that the identification of the glyph as Grantha OM is Ganesan’s own personal reading. It must be reiterated here, that Grantha does not use any specific ligature for denoting OM. It is either denoted by Long O + Anusvara or Long O + Pure-Consonant M. Therefore, the claim for the existence of the special character for Grantha OM is completely dubious. On the first look of the Ganesan’s proposed glyph, it occurred to me that the so-called Grantha OM identified by Ganesan should probably belong to the Oriya Script