I'll go on a limb and guess that in one of the gazillion ways to read numbers in Japanese, 907 is also Kanna? (most likely ka / - / na or something like this...)

millionknives said:

I'll go on a limb and guess that in one of the gazillion ways to read numbers in Japanese, 907 is also Kanna? (most likely ka / - / na or something like this...)

Kind of. It's a stretch.