Early 20th century
A.D.P economy range ...
("A.D.P is a trademark of Adolph Posener & Co. standing for Adolph David Posener. Brothers Adolph and David Posener were associates until 1877. When David left the partnership, the trademark remained A.D.P. but the hallmark on silver work was A.P. imprint.")
It's also written that the pipes were marketed under the label
A.D. Pierson suggesting an anglicisation of Posener in the way of for example Rabinovich sometimes turning into Robinson or Robbins
... and
BEST ENGLISH MAKE stamped on the electo-plated army mount + McLintock SYRIAN LATAKIA BLEND:-
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Photo credit: Dino Argyropoulos