This series is constituted of 20 figures among which 3 are identical (palm trees). Peter Konrad's book takes up the figurines to 24 in this series, among which another Marie and another Jesus, both different, a dog and a sheep, as well as he replaces 2 trees 2 others. ( See HERE).
After consultating the author, the reason is that the SIKU firm (figures manufacturing), had inserted the dog and the sheep into a colored version. As to others they definitely have the brand engraved under the base or on paper, and as no other crib Fri-Homa went out since, Peter Konrad inserted it into the series.