NGC 7448 is a spiral galaxy in the constellation Pegasus and also appears in the Arp List of Peculiar Galaxies under the “Spiral galaxies with detached segments” group as ARP 13. You can see from my image what Halton Arp was referring to - you can see the small knobs or bumps on the spiral arms of this galaxy about 100 million light years away.
Tech Specs: This image is composed of 60 x 15 second images at ISO 3200 with additional dark and bias frames using a Meade LX90 12” telescope, Antares Focal Reducer, and Canon 6D camera. Imaging was done on September 27, 2016.