60C/70C Circuit Breaker Marking?

[xguard]

I don't recall seeing a circuit breaker before with a 60C/70C rating before. This circuit breaker is on a generator. I've seen them marked with the ambient temperature rating for the circuit breaker trip curve but this looks like it's referring to the lug temperature rating. I'd assume I'm limited to the 60C ampacity column. Thoughts? Any information would be appreciated, thanks.

 

[infinity]

The NEC would be either 60° C or 75° C so it's either mislabeled or it was designed for use not under the NEC. Those numbers would be the temperature rating of the terminals. The 40°C would be the ambient.

 

[augie47]

Here is a more clear picture. The 40° appears to relate to the UL Interrupting rating.
The terminations are 60/75