Searching in ArtStor is a great way to get visual inspiration for your designs through objects and art. One advantage of ArtStor is you can zoom in very closely on the image and look at the details.
Go to Advance Search and set the dates to 1950-1980 and the geography limited to North America and Classification to Fashion, Costume, and Jewelry
Here are some search term ideas:
You can also limit the geography to North America and the Classification to Architecture and search for Shingle