The photos show that cob 190e bears little resemblance to the later versions. This is because the arrangement was literally re-arranged. 190e plays verse-verse-chorus-chorus and the later versions play verse-chorus-verse-chorus. Also, the second repetition of the verse on 190e is played without accompanyment.
Cob 190b has a few extra Octave Notes compared to the later versions and was initially thought to be the early arrangement.