1. 1896 to 1967. www.flickr.com/photos/davislenscraft - scanned images or negatives

2. 1968 to 1978. www.flickr.com/photos/davislenscraft1968to1978 - scanned images, negatives or slides

3. 1979 to 1982. www.flickr.com/photos/davislenscraft1979 - scanned images, negatives or slides

4. 1983 to ?. www.flickr.com/photos/davislenscraft1983 - scanned images or negatives until 2000, digital thereafter