This is the place for the discussion of the emblems on Dr. Grabow pipes, including, but not limited to, the Spade and earlier "propeller" or chain link(?) insignia found on the stems of the pipes. Just putting something up quickly that I will further refine and update later.
The text below will be the relevant part for the casual reader of this page. The codifications are my own that I use on various charts to record findings.
ST (Spade, Top, begining 1944-45?; >s = pointed to Smoker; >b = pointed to Bowl); SS (Spade, Side, beginning 19xx; PT (Propeller, Top, until late 1944?); T (“target”, two metal inserts like target, c1942 or earler?).
Blue Spade = filter pipe. White Spade = Ajustomatic non-filter pipe.
Yellow Spade = indicated a less expensive push stem pipe. (Info from former employee Jack Martin through DRB).
Orange = Seemed to only be used on Westbrook Ajustomatic special offer pipes. No Westbrooks are numbered as far as known yet.
