Was this listing already mentioned here ?
I see a Terry (McGee I guess?) already contacted the seller…
The seller has very honestly pointed out the proximity of the long-F post mounting to the “F# hole”, or more exactly the lowest hole that would be covered when making that note. FWIW, I can’t recall ever seeing a pillar that close to a tonehole and suspect it would pose real problems for me, as I don’t (probably can’t) play with tips of fingers pointed down. Mounts on some German flutes even pose minor fingering intrusive issues for me.
It does seem to have nicely large toneholes and if it does play with a good scale at A=440, should be a cracker.
long f hinge: seems like an odd choice
looks like balance point
might’a lightened the touch a bit and moved the hinge down flute some
spring should be able to sort any push imbalance issues across the flute.
as we all await Terry 
looks like an awesome deal !
Yes, I’m the Terry who contacted the seller for information for my Extant Prattens page. As you’ll see at:
http://www.mcgee-flutes.com/Prattens-Extant.htm
It’s so far the highest serial number Boosey flute marked R.S. Prattens. It seems pretty similar to earlier Prattens, although a little shorter in sounding length and a little longer in C#-D# length. No big deal though.
I guess the point about the location of the Long F post is that it wouldn’t suit anyone using “piper’s grip”. My block-mounted Pratten isn’t very good in that regard too - almost every finger runs into a block or the edge of a key. Of course Pratten would have been astonished to see anyone holding a flute like that. He must have used the 19th century three-point hold, or he wouldn’t have been able to use his thumb C key.
Terry
Discovered this design “miss” on the Rudall Carte 7103 where the edge of the F-key wooden block is a little in the way when covering the F# tone hole with the flat of the finger joint, but I’ve soon got used to it. As Terry wrote different playing style back in the day when these flutes were built.
One is likely to qualify anything as long as it would mean not having to admit to an error.