What is the age of marlin glenfield model 30 golden 50 serial number 693508513?

The Marlin Glenfield Model 30 is a lever-action rifle that was produced from the early 1970s until the mid-1990s. The serial number you provided indicates it was manufactured in the 1980s. Specifically, the 693508513 serial number suggests it was likely made around 1983. For the most precise dating, consulting the manufacturer's records or a dedicated firearm historian would be advisable.