Recently I got a great deal on these three slug plate style embossed bottles from a local Ebay seller. First one is J. Kazmaier, Brewer, Altoona, PA. Seams stop halfway on the crown. Has D.O.C. 1243 near the base.
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Next is Dean's Bottling Works, Connellsville, PA. Seams fade out before the crown. No glass maker marks visible
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Next is D.P. Lowe Bottling Works, Mt. Pleasant, PA. Seams go all the way to top. Has D.O.C. 72-4 near the base.
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There's a decent amount of info out there about Kazmaier's but very little about D.P. Lowe or Dean's Bottling Works. I am not familiar with the codes that Dominic O. Cunningham Glass Company used. If anyone knows what they mean, please let me know.