Part Number: MSP430F2618
The datasheet doesn't seem to specify what the part markings are for MSP430F2618TGQWTEP, it's highly unlikely that this microcontroller comes without any markings.
I found two websites of unknown reliability that indicate that the part marking should be "F2618GQWEP". I would like to confirm the part markings which are to be expected on MSP430F2618TGQWTEP.