> ... τουτον γαρ ο πατηρ εσφραγισεν ο θεος. [John 6:27 TR, undisputed]

> ... this he for the father did seal the deity. [Literal]

> ... for him did the father seal *even* God. [YLT]

If one removes the italic from Robert Young's translation (the italic being an admission that the word is not in the original) then one has an equivalence :

> ... for him did the father seal God.

'Him' (the Son) is in the accusative as the one being sealed.

'the God' is nominative and therefore has equivalence to the subject 'the father'.

Instead of adding 'even' in italics, would it be appropriate to add 'as' in italics :

> ... this he, for, the father did seal *as* the deity. (Proposed)

Does the text indeed state a grammatical equivalence ?

What other reason is there for the word order to be as it is, that is to say the nominative following the verb when a nominative already precedes the verb ?

Is not the meaning that the Father has impressed his seal upon the Son to demonstrate that he is equal Deity ?