Probably capped off the vent with those.
The pressure cooker is a Fagor Elite, 6 liter. I own the 9.5 liter (10 quart) model. Identical bottom markings and the lid is the same.
The 6 liter Elite is marketed in the US as a “6 quart” whose capacity is actually 6.3 quarts = 6 liters.
They removed the pressure indicator valve and replaced it with a bolt to seal the cooker up tighter.