The men in this photo are members of the Amalgamated Glass Workers, Local Union 63. Either Otto Langstaff or his brother Clarence Langstaff photographed the union members standing with their banner, probably ready for a parade in downtown Seattle about 1900. Glaziers are skilled tradespeople responsible for cutting, installing, and removing glass.

Clarence R. and Otto Langstaff were prolific amateur photographers in Seattle. Clarence (1880-1941) worked as a carpenter and also spent time at Mt. Rainier as a guide. Otto (1883-1969) worked for W.P. Fuller Company as a glazier and was a member of United Glass Union #188. Because most of their photos are not signed, it is often difficult to discern which brother was behind the camera.