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Mouth-blown (aka "hand-made") bottles were produced by skilled craftsmen who gathered the hot glass onto a blowpipe manually then formed the bottle with air pressure applied by mouth to the blowpipe, with (usually) or without the aid of a mold.The 1908 image to the right was taken at the Seneca Glass Works in Morgantown, WV.The hidden tang also only has a small width of tang running through the handle to the threaded portion where the pommel is screwed on.
It's easy enough to identify specific components and their location (like the point of the blade), other knife parts are more generalized to an area (like the grind).This volume begins with an overview of bottle identification and dating, and a review of hand-production technology.After 1880, the mechanization of glass bottle manufacture revolutionized the industry.This is another indication of a machine-made bottle. Most bottles with embossed lettering date from the late 19th century and later. Keep in mind that older technology often persisted and some bottles date later than you might think.Lettering on the body will give clues to the contents and lettering on the base will give clues to the manufacturer. Is the bottle machine made and aqua- or light green in color? For example, glassblowers still make hand-blown bottles today.