Advertising Pinback Button: Ammonia, We Clean Up Everything

This oval advertising pinback button was made in Toronto by Thomas Wibby (Bastian Bros), an advertising novelties company active in the 1920's and '30's.

It features a bulldog illustration in black ink against a yellow background with the text "Ammonia" and "We Clean Up Everything".

Condition: Good used. Celluloid cover intact. See photos for details.

Dimensions:
Height – 1"
Width (at widest point) – 0.75"
Weight: Less than 1 gram