windert pocket watch

I acquired this from my late father, who passed away very suddenly and far too young. He got it from his father. I am really clueless in regards to any history of it besides that. I've googled the watch, but to no avail. I am wondering if this may be of heirloom quality, or more functional? It works great and the pendant set functions perfectly.
If anybody has any info at all which could help me identify it, I would greatly appreciate it.