Another Burian Diplodocus – or is it?

From: G.E. Quinet (ca. 1970), Bernissart… il y a 125.000.000 d’années (Brussels: Royal Belgian Institute for Natural Sciences), opp. p. 71.

This Diplodocus carnegii is almost an exact mirror image of Zdeněk Burian‘s famous early 1960s reconstruction. It might be an earlier version of the same reconstruction, and I can’t be sure whether it was mirrored by Burian or this particular book’s designer (I would think the latter, to be honest). However, it is unsigned, the publication itself gives no clue as to its provenance, and I have seen it nowhere else in listings of Burian’s work. So the jury is still out.