This may help a bit, if not, still good reading.
http://www.rdfield.com/Articles/A%20Dunhill%20Pipe%20Dating.htm
Sorry mate, guess the link don't work.
I have 5 Brogs and they all pass a cleaner easily mate. Pm Mr. Brog and let him know you are having trouble, I am sure he will rectify it. His customer service is awesome.
You are right cap. They were included in with 4 other pipes I got at the same time and I paid $60.00 for the lot. I have been offered $500.00 for the set of Loewes, case included but I shall keep them.
Just rehydrate it mate. I just put a few drops of water on a balled up piece of paper towel, put it on a piece of tin foil and place it in my PA tub,(14ozs). I add a drop of water every once in awhile and the tub stays great for a month or two of smoking.