127v 60hz TV to 220v 50hz
In my opinion you can safely use this TV with 240 V, 50 Hz.

The 120 V 60 Hz is in it's own section and suggests that the FCC and UL US-listed ratings are for use at 120 V 60 Hz. Since FCC and UL US are only for the US where they use 120 V, this makes sense.

The UL Nom rating is broader and applies to 110 - 240 V 50/60 Hz.

Do note that in Portugal the oldfashioned analog TV broadcasts are in PAL format while in Mexico NTSC is used. If you're lucky the TV will handle that seamlessly for you. If you use a settop box (for digital TV) and connect over HDMI then that should work fine.