I agree with the second one being 552. The top one is probably 498 but looks like it could be a rotary printing. The chances are slim, but I think it would be worth the trouble to scan it.
Posting a large clear scan is one way. That by itself won't teach you how to identify them yourself. Take a look at this post on this thread and then read through the rest of it: https://goscf.com/t/40718#349013
That's a pretty good overview of how distinguish between flat and rotary printings.
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