I am getting confused, 75, 45?
I gave it another try, now in Powerpoint:
top line is Frutiger55, middle is 55simulated bold bottom is 65.
And this time - actually in Powerpoint - the 65 is a bit 'bolder' than the 55 made bold and does run wider.
So Heron I think you are right with using a different font set. Customer may have all and designer only one?
Have fun and ... be nice to the cats
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Relax ... it is just a font