Depending on the set there may be ways to help you determine if they are what they are said to be, though with used sets none of this is for sure.
- The top balls from Aramith (Tournament set, Super Aramith Pros, and Brunswick Centennials) leave the factory as matched sets. This means that when new the balls should all be very close in size, weight, and color. With matched sets, if the balls are said to be fairly new, then the colors should be consistent throughout the set. More importantly, the weights should be very close. If you weigh each ball in the set they shouldn't be off by much. If they are then either they are not genuine, they are older than purported to be, or not all the balls are original to the set.
- For color, check the white of all the balls for uniformity, and check the colors of the corresponding balls (the brown of the 7 ball with the stripe of the 15 ball, the yellow of the one ball with the stripe of the 9 ball, etc.). If the colors seem off then the balls are either not genuine or they are older than stated (over time balls may discolor at different rates, leading to color variances).
- If the cue ball and maybe the one ball weigh a little less but the rest of the balls are close, that would be normal since these balls incur the most collisions that strip them of size and weight. Especially true of the cue ball.
- The cue ball should be the proper one for that set. The Tournaments come with the Tournament CB, the Cents with the blue circle, the Super Pros with the red logo, and the Super Pro TV set with the measles ball (probably the most counterfeited ball out there). If the set is used and the cue ball weighs more than the other balls then even if it is the proper CB for that set it may be a replacement for the original CB.
That looks like Centennials, they probably just put them in a different box. The coloring and design looks legit but it looks like a mix of the TV set and the regular set, note the pink 5 and 13 ball.
Hopefully that is just the camera and not actually pink 5 and 13 balls. In a the real Super Aramith Pro TV set it is the 4 and 12 balls that are pink, to distinguish their usual darker blue from the lighter blue 2 and 10 balls. The 5 and 13 balls are orange in both the TV and traditional sets.