This alternative sequence also accounts for the phonetics of Verner's law (see below), which are easier to explain within the glottalic theory framework when Grimm's law is formulated in this manner. Source: Internet
Dating the change described by Verner's law It is worth noting that the change in the pronunciation of the consonant, described by Verner's Law, must have occurred before the shift of stress to the first syllable. Source: Internet
See the Verner's law article for a more detailed explanation of this discrepancy. Source: Internet
Until recently it was assumed that Verner's law was productive after Grimm's Law. Source: Internet