I have 3 different papers for my great-grandfather: his petition for naturalization, his declaration of intention and his naturalization certificate.

-petition for naturalization: has a number at the top-right, just above where it says "original", but then there is an empty no.____ at the top left.
-declaration of intention: has a number at the top-left, but then there is ANOTHER number on top of that number.
-naturalization certificate: has a number at the top-left, presumably the certificate number, but then there is also another number, which is the volume and petition number!
SOOO, you can see my confusion! I have no idea which number is the correct one to give to USCIS to request this file. please help if you have any clue! I have uploaded some pictures of the photocopies I have for reference, and my finger to show where those numbers are.
THANK YOU!!!