Excellent condition Pureoxia bottles with wire-attached porcelain caps.  All with "PUREOXIA BOSTON" in raised letters on glass, back has "REGISTERED 1 PINT AND 12 FLU OZS" on back.  Bottom has imprinted years of bottles.  One each 1922, 1923, 1925, 1928 and one blank.   This is an incredible value as antique collectors have paid between $50 and $100 each.  See Antique Site.