Listerine/Lambert Pharmacal Company base N in a circle. Bottle manufactured by Obear Nester Company East St Louis Ill 1894 to 1915. That Bottle Co had several marks and has a N in rectangle BIM up to 1915. And N in Square 1915 on Auto Bottle Machine to date(or whatever) Listerine was available only by RX until 1914 and is now owned by Warner/Lambert. Warner being the old safe cure company. Clear four sizes.