1922 Ad US No 4 DC Type Industrial Ozonizing Unit Factory Manufacturing IEC2 XGYB2 At the time of printing

At the time of printing

Hans Nowack

"Untitled Pastel (4)

This is an original 1907 black and white halftone print of the Plaza de Zocodover

1922 Ad US No 4 DC Type Industrial Ozonizing Unit Factory Manufacturing IEC2 XGYB2 At the time of printingThis is an original 1922 black and white print ad for the No. 4 DC type industrial ozonizing machine that was made and sold by the United States Ozone Company of Scottdale, Pennsylvania (PA). CONDITION This 91+ year old Item is rated Very Fine +++. Light aging throughout. There is light bleedthrough on this piece from the verso. Product Type: Original Print Ad; Black White Grade: Very Fine +++ Dimensions: Approximately 3. 5 x 10. 25 inches; 9 x 26 cm