"No-one is blocked from leaving comments here. But, unfortunately, there is a hitch in the system that you have to be a Google+ member to leave comments on a Google+ site. Sorry, but I can't change Google."

"The pre102 has just the early crown stamp. There is some surface dirt."

"Holding your piece and juggling! There's a thought. I look forward to your findings - I tell myself I can see the inward/downward sweep of the top line of the 'other' crown but am not sure."

"Keith, I'll look carefully tonight. My children bought me a digital microscope for my birthday - it is great for these photos. Though I have to juggle holding the piece and microscope in one hand, keeping it in focus as I click the mouse with the other hand."

"Looking back at these, I've just noticed - on the 'pre-102' image there appears to be a double-stamp imprint: the underlying, less effective, one seems to be of the other stamp design? What do you think?"

"I should have said: an excellent series, Alan - I've always had problems taking direct photos of stamps - enlargements blur things and the 'paint' obscures the actual imprint: this really does show up the true nature of the stamps better than any I've seen."

"Keith, I am just recording photos that will build up a picture of evidence. It seems so far that all the "stamps" are individual. Alan"

"No apparent ',' here either - how important a sgnifier do you think it, especially if the 'stamps' are each hand-made/engrved ?"

"Appologies Alan, I should have checked before asking."

"Keith, photos of the set, casket and label have been on my website since the beginning and are in both of my books. I have now taken some new photos and collected them together in a new album https://picasaweb.google.com/Fersht/19001915IvorySetWith1849CrownStamps# This is pasted into the caption of the next photo for a quick click"

"Alan - do you have images for the whole of the C20th set? It would be interesting to place it in context."

"Thanks, Alan, I get your point - I think! Aparts of my mind are disintegrating as a result. 'though."

"Keith, the next photo shows that all aparts of the No. 75 crowns can be found at all positions in the 4 crowns on the 1900-15 set on integration."

"The 1900-15 set is shown in https://picasaweb.google.com/Fersht/19001915IvorySetWith1849CrownStamps# I'll add some microscope photos of the rest of the stamps to that album tonight."

"There are many other identical shapes between the 1900-15 stamp and the J.Jaques 1849 on 75, the clearest stamp and 172, the next. The crosses are identical, the circle beneath, the nibbles to the left, the left hand vertical with its kink, the angle of entry and then the shape of the middle line across. It looks likes the same stamp on all, with some variations to the degree of hammering and the angle of contact with the ivory."