x-valve or rt valve

[Breeze2782]

When they made the 1st x-valves did they still have the rt pro laser engraved on the side. If so how do you tell the difference between them

[TMAXXKING1]

yes and the rt xvalve is all black and says rt/xvalve on it
then there is x valve with xvalve spelt out on the side
and a newer one with just an x on the side