"Y" suffix indicates the newer YESS mount toms. On those, the air hole was moved from the badge to the shell, near the batter head. So there should never be a YESS mount drum with an air-hole badge on it.

So the badges are legit looking (I've not ever seen bootlegs of them anyway)

I posted elsewhere regarding the various suffixes found on these drums.

RC is standard recording custom

RF is "force" series

There was another for the third depth I can't recall right now. RP maybe? (for the Power series)

And the Y indicates it is a YESS mount drum, which you can see with the mount. I think depths were standaridized across the line too- somewhere between the "old" standard sizes and the deeper drums of the 80's. But I'm not certain and I imagine the earliest YESS mount drums still had both depths offered. I do know that there are exactly ZERO legit cobalt blue drums with YESS mounts.

And to the previous post, they always have two badges on the pre-YESS drums, so if you change the arrangement (which might move the air hole/badge inboard) there is a plain (no serial or other stamp- it is a plain badge) one there to keep a uniform appearance and allow Yamaha to make one of each size drum, rather than a "left mount" version and a "right mount" version.

A recent discovery, with my recent acquisition cobalt blue snare, is an (original) badge that has sharp top corners and rounded bottom corners. As far as I can tell (so far) it is either a mistake, prototype or earliest version of the badge after the 9000 series ended. Perhaps even a transitional. Still digging on that...