I think that these may be counterfeit
unless MAC has changed their fonts?
While I don't have a 239, the lettering is consistent to the other 2, and that lettering is different to the lettering displayed on my entire stash of MAC brushes.
In the ones you purchased - the gap on the M is in the centre of the trough in the middle of the M. This is inconsistent with the MAC logo. The gap should be on the left hand side portion of the trough, and it should be a small diagonal slash, not a straight one.
The cross bar of the A has a gap that is too large, also inconsistent with the MAC logo.
The font of the brush number on the 187 is inconsistent with my 187's font.
The ferrule of the 219 looks different to mine also - yours looks tapered then straight, mine tapers all the way to the handle.
If one of the brushes had a logo that looked off, i would put it down to being handmade. all of them means that something is not right.
here's some pics to compare yours to:
My 219 (the ferrule is a bit corroded):
Close up of 219 handle:
187 handle (some of the silver text has rubbed off)