(Thanks to Ken Previtali for the information on the ginger ale bottle!) The “G” is very similar in appearance to a horizontally oriented oval. Also seen on the base of a cobalt “Perfection Ginger Ale, Brooklandwood Springs Company, Baltimore, MD” bottle. This particular mark is confirmed to exist on the base of a cobalt blue rectangular “2 oz” marked bottle, with vertical ribbing on the front probably an iodine or poison bottle. M inside a G (shown, lower right) …………………… Maryland Glass Corporation, Baltimore, Maryland (1907-1980).Mosser Glass Company – “M inside a circle” mark on the base of ruby red toothpick holder/votive candleholder. Also please see “M” and “M within outline of the state of Ohio” entries, as well as the “M inside a circle” entry concerning Maryland Glass Corporation.
NOTE: the “M” may or may not have slightly angled vertical strokes so that the letter appears to be an upside-down “W “. Mosser Glass Company, Cambridge, Ohio (1971-to date). M inside a circle (on tableware, novelty glass, salt dips, glass shoes, children’s mugs, decorative toothpick holders and many other types of reproduction colored glassware, typically not on utilitarian/commercial containers)………………………….M inside a circle (on the bottom of glass containers, especially medicine bottles of many types and sizes, often in cobalt blue glass) – see more information about this mark on this webpage…………… Maryland Glass Corporation, Baltimore, Maryland (1907-1980).Here, as embossed on the base of a small cobalt blue Bromo-Seltzer bottle. “M in a circle” mark used by Maryland Glass Corporation. This company might have expanded to become a distributor of a wider variety of goods for department stores in later years (?) Here is a link to a fire insurance map from 1894: This glass maker, located on the corner of Culvert Street & Trenton Avenue south of Waterloo Street, specialized in lamp globes, shades and other lighting fixture-related glassware as well as novelty items. Murray & Company (Murray Flint Glass Works), Philadelphia, PA (c.1891 or earlier – c.1922 or later?). M (on the bottoms of intricately designed, hand decorated milk glass dresser set items, such as shallow ring trays and glove trays)………….See “M inside a circle” and “M within a G” entries, as well as next entry.
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pdf article: NOTE: In some cases a “plain M” may be the mark of the Mosser Glass Company, Cambridge, Ohio (1971-to date) but in those cases, keep in mind that Mosser produces upscale decorative and novelty glassware, not utilitarian containers. For in-depth information on the marks attributed to that glassmaker (also known as Reed & Company), see this. Some of the “M” marks appear with numbers or letters (see my “M B” entry on this page). Researcher Bill Lockhart believes that Massillon Glass Works, of Massillon, Ohio (1881-1904) could be the source of the “M” mark on beer bottles. There were a number of bottle factories just in those states with a name beginning with “M”, which shows why it is so hard to know for certain who the maker of those bottles was. That unidentified glass manufacturer was probably located somewhere in the Midwest, i.e. BOCHART, NEW ALBANY, IND” are marked with a plain “M” on the bottom, and those would date sometime between 18, judging from the years that bottler was in business). (For instance, some beer bottles marked “F. 1880-1905, and the glassmaker in those cases predates Maryland Glass and to my knowledge remains unidentified with certainty.
Maker is uncertain.Īmber handmade salve or cold cream jar) that appear to date c. “M” on base of amber salve jar, circa 1880s-1890s. Also, a similar mark is seen on the base of certain mouth-blown amber, aqua and clear beer bottles (and a smooth-lip If a bottle with a “plain M” is a medicine bottle and was made in cobalt blue colored glass, it is almost certainly a product of Maryland Glass. Most Maryland Glass bottles, if they carry a mark, have the “circled M” on the base. Exact period of use is uncertain, but verified on the base of cobalt “Milk of Magnesia” bottle from circa 1950.