Quoting lolajessup:" <blockquote><b>Quoting L☮J:</b>" OP you know you don't NEED the base,right?"</blockquote> ... [snip!] ... NEED the base,right?"</blockquote> I know. I just wanted to see if we'd be able to use the base we have with a new seat."
Are the labels still readable? Something o. There should maybe give you some indication.
Does the base have a red dial on it to adjust the angle, or is it just a recline foot that you have to press two buttons in and pull down? If it doesn't have the knob then its a basic snug ride base and will work for the 22lb models.
If you do end up having to buy a new seat, Cosco has a 4lb infant seat for like $60