This is the Roy Graves Canning Company Girls’ Band, from Sheridan, Oregon. Founded in January 1919, with members from the female employees and daughters of the fruit canning business, it was outfitted with new uniforms and Conn instruments, and gave its first concert in April that year. Over the next two years it performed in many towns and at various events in Portland and elsewhere in western Oregon. Its fate beyond 1921 is not known.
For more information about this short-lived band, see the article, linked below:
The Cannery Girls’ Band – a short-lived, fruitful organisation in Sheridan, Oregon
IBEW - the History of Brass Bands 