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I'm talking about the gap between the 1 & 0, the 1 & 1 and the 1 & 2 in the 10/11/12 numeral pairs.
It's normal that you'd have a bigger gap in the 11 but in general with numerals like these you'd expect to see a more consistent spacing within the 10 and 12. On the Big Eye, for me, both the 10 and 12 are a bit tight and in the 10 in particular the 1 & 0 are a lot tighter than I'd expect. (I say a lot tighter, we're talking minuscule differences here.)
Couple of examples of vintage Longines that have spacing more in line with what I'd expect for the style:
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Kerning wise I don't think it too bad. There could be a fraction more space between the "1" and the "0" but anything more than that would make the overall look too elongated in reference to the other numbers.
The cushion case example looks better as the arms in the "1" fill the negative space nicely for a better optical balance.
As you say, does depend on the weight of the typeface.
I think its balanced with the big subdial and if you look, the 4 5 have a similar spacing...