30 Year old faucet cartridge replacement
Looks like a Price Pfister (or import copy thereof). Looks like a good quality faucet that is worth saving.
Note- you don't necessarily need to buy new &quot;cartridges&quot;, these are totally rebuild-able unless physically damaged. The washers and o-rings should be readily available at a good hardware shop or plumbing shop (maybe not at big-box center). Waterproof grease and washers it will probably perform like new.
Look for Price Pfister widespread faucet parts. Bring the old because there are several configurations/types. If replacing stems/valves be aware that there are specific &quot;left&quot; and &quot;right&quot; because the levers move opposite of each other.