It's a good runner and should keep time to 30 seconds a day or better. The movement is a 17 jewel Standard Time 1686, which is basically an A. Schild 1686. I think it would be described as medium quality and should hold up to many years of service.
Here is the page from Dr. Ranfft's site... http://www.ranfft.de/cgi-bin/bidfun-db. ... ndard_1686
If you're interested, I can give you a quote on refinishing the dial and hands, but wait until you see the pictures to decide. I'm away from home today, I should have the pictures up tomorrow. The case and movement are in very good shape, with nary a fault. You also have a very nice vintage Kreisler stainless steel band in very good condition.