Sylvania Zinsco electrical panels are known to the inspection industry to be problematic (just like Dracula…) and should be further evaluated by a qualified electrician.
But what exactly is so problematic about them? This brand of electrical panel is a known latent hazard, risking failing to protect your home from a fire or injury should an over-current hazard occur. Replacement is typically advised by qualified electricians, familiar with these panels, and certainly by myself. How do you spot these panels you might ask? Sylvania Zinsco panels are easy to spot by their brightly colored and thinner (compared to modern electrical panels) breakers.
Please check out this link for more information if you have concerns: Recalled Electrical Panels: What You Need To Know [With Photos] (sunelectrician.com)