1922 Ad Gaertner Comparator Spectroscopic Scientific Equipment Laboratory IEC1 RKO1 There is a hole and

There is a hole and blemish in the top right corner of the outer border--please see image

Chickering & Sons was the largest United States piano manufacturer

It is an example of Norman architecture

This is an original 1916 halftone print of a five-cylinder bike

Sport Touring

1922 Ad Gaertner Comparator Spectroscopic Scientific Equipment Laboratory IEC1 RKO1 There is a hole andThis is an original 1922 black and white print ad for Gaertner Comparators, a product line by William Gaertner and Company, located on Lake Park Avenue in Chicago. CONDITION This 89+ year old Item is rated Very Fine +++. Light aging throughout. No creases. No natural defects. No surface rub. No tears. No water damage. There is some bleed through visible on this this ad. Product Type: Original Print Ad; Black White Grade: Very Fine +++ Dimensions: