Something wrong happens when you try to search the coin in subject.
That goes wright for KM 419,420,422 but for KM421 we have the feedback "No result has been found."
Meanwhile if you enter 1 (without "Cent") in the Face value field then it opens the spec page of that coin.
??????
This is because the monetary values of all coins in words must be written: 1 cent and not one cent.
In this situation, KM 419 420 and 422 are written correctly (1 cent) but KM 421 must not be entered normally (only 1 in the written value and not one cent.)
I'm going to make a request for a correction.
The problem is not what I mentioned, but it works for me, so you have to check with you.
It must not come from the site :
but since I'm on the French version and you're on the English version, maybe the problem is only on the English version.
ok, i have test on English version, and there is a problem.
In the english version, the KM421 doesn't exist, but on the french version, it exist.
I'm going to create it