The dots
One blue or green dot

▲ ◊ Blatter Bros., Montreal ◊
This pipe was carved during the "factory period" (before 1964) but it was marked with a
green dot which only appeared in 1964 and was continued untill 1967. After 1968 Blatter pipes were marked with the red dot. The stamping corresponds to a period
ranging from mid 70ies to
1981.
More about Blatter markings...
Blatter & Blatter Inc.
Pipemakers since 1907
Artisan: Robert Blatter
▲ ◊ Real Briar, Foreign (In diamond), Blue Spot, Regd. No. 8732445 ◊
The spot may be discolored
▲ ◊ Clairmont, Handmade, Italy ◊
▲ (Left side) ◊ Freshman ◊
(On top near stem) ◊ Made in France ◊
Greg Clemons

▲ ◊ GSC USA ◊
Artisan: Gregory S. Clemons
▲ ◊ Indrwicks, Founded 1797 ◊
Inderwick & Co was founded in the early 19th century by John Inderwick. The warehouse was situated 58 Princes St, Leicester Sqr, London

Piladelphia

▲ (Left side) ◊ Middleton (Arched), Selbur, Bruyere ◊
(Right side) ◊ Made in England (In circle) ◊
▲ This is a pre-WWII churchwarden pipe.
▲ ◊ P.G.C. HAJENIUS, Amsterdam, Bluespot ◊
House brand of the amsterdamer tobacconist. The rear area of the shop makes a place for a tobacco museum and library, along with a lounge where customers can order drinks and relax with their favorite smoke.
Address: Rokin 92-96 1012 KZ Amsterdam
▲ (Left side in diamond)
◊ Finest, Pall - Mall, Bruyere ◊
(Right side)
◊ Made in ◊
◊ London.England ◊
▲ The dot on the stem is supposed to be light blue.
Pall Mall is a street in the City of Westminster, London renowned for being the home to various gentlemen's clubs and specialy the Diogenes Club a fictional club created by Sir Arthur Conan Doyle. Phileas Fogg ("Around the World in Eighty Days" J. Vernes) was member of the Reform Club in the same street.
▲ (Left side) ◊ Paronelli ◊ (Right side) ◊ Sardinian, [star] Briar ◊
▲ (Left side)
◊ Pimpernel Blue ◊
(Right side)
◊ 139 ◊
▲ Pre-transition, 1919 - 1924. One dot on top of the stem
(Left side) ◊ Sasieni, London Made, PAT. N° 150221/20 ◊
(Right side) ◊ 30 ◊
In the context of the
Sasieni/Dunhill trial and according to Stephan Smith:
"In an initial attempt to comply with US patent law, Sasieni moved the one blue dot to the side of the pipe. This unfortunately didn't do the trick, and only a few side dot Sasieni's were ever made, which are now extremely rare and collectible."
▲ Transition period, 1979 - 1986
(Left side) ◊ Claret, London Made, By Sasieni ◊
(Right side) ◊ Made in England (Arched) 38 ◊
▲ Transition period, One dot, 1979 - 1986
◊ The Alternative, London made, by Sasieni
(Left) England (Right) ◊ ▲
Schoenleber
Newark (NJ)

▲ ◊ SCHOENLEBER Hand Made Imported Briar 5 ◊ Blue dot
▲ (Left side) ◊ The Carlyle Pipe ◊
(Right side) ◊ Made in England (In circle) 164P ◊
▲ (Left side) ◊ Pipe of the Month ◊
(Right side, top) ◊ Sweet Root ◊
(Right side, bottom) ◊ Wally Frank LTD. ◊
▲ Each member of Wally Frank's "The Pipe of the Month Club" received a brand new pipe in the mail once a month.
▲ ◊ Wilkinson, Imported Briar ◊ Blue dot ▲