Pentel Smash: marking on button

Is it correct that the first version of the Smash had a marking (the lead diameter) on the button whereas the newer ones no longer do? I have both but I don’t know whether the difference relates to the generations. If that’s true: When did the change take place?

I think it happened around the time of the Smash 0.3 Revival… 2019?

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Thank you!