I recently acquired this Ashton Brindle XXX Made in England and I am having trouble finding the date the pipe was made. I have looked at all the sites to find the date and none mention this a mark like this one on the pipe I have. After the "D" in England there is what looks or appears to be an apostrophe, nothing else. I seek knowledge from the Wise ones on here as to what the date could be. Thank you very much. The pipe has a beautiful ring blast on it.