Presto Pressure Cooker 409a All Presto Pressure Cookers have the number 409A stamped on the bottom of the cooker. This is not the model number. It is a number used to indicate the product's listing by Underwriters Laboratories. Please see; How do I find my model number? If you need more help finding parts for your Presto pressure cooker or any older pressure cooker CALL US! Need Help? 800 851 3266 admin@cookingandcanning.net Your Presto pressure cooker parts specialist. *Orders placed before 2:00 PM ET will ship same day. Orders placed after 2:00 PM will ship next business day! Presto® Pressure Cooker Parts Presto® Pressure Canner Parts *Presto® is a registered trademark of National Presto Industries Inc. Cooking and Canning Company is a reseller of National Presto® products.