LJ24B Max cruise EGT

Hi,

as per yesterday I am a proud owner of the LJ24B as well.

I was going through the manual and stumbled upon the cruise setting being max EGT 420C,  max M .87, wing temperature in green.

Is that a typo, as the green arc on the EGT goes up to 720? (With power set at max 420 I would reach a much lower speed than the mentioned M. 85- M .87 at FL450 at current summer temps.)