Thanks JP :sun: I managed to find a picture of page 87 where there are vases that, as you say, are remarkably similar in shape. I'm pretty sure it is Loetz, so I'll keep an eye out for a match on the enamel variation as it is different to those I've seen. I'm also curious as to the enamel mark on the base.. I wonder if it is the decorators mark? As I remember the Carneol version is dated to 1880 so your comment about the reference to the interior being white by 1890. I recall seeing one that did not have this interior and there was a questioning as to whether it was Loetz marmoriertes. Perhaps the reference to the interior means that prior to this they were made without the white or pink and just clear.
thanks again for taking the time to look for me.