T. Prowse & W. Card in G&H auction

Irish Flute
1

Nice T. Prowse and W. Card in G&H auction on December 8th-9th, 2016:

T. Prowse
http://www.gardinerhoulgate.co.uk/Catalogues/mi081216/lot0827.html

W. Card
http://www.gardinerhoulgate.co.uk/Catalogues/mi081216/lot0831.html

2

There are certainly some interesting flutes coming up in the Gardiner Houlgate auction later this year.
I believe those William Card flutes are rather thin on the ground, and I did not know that Card had patented his own system of flute.

Are the estimates a bit higher than is usual for Gardiner Houlgate, or is it just me?