From left to right:
MK PRO low D whistle
Goldie’s low and tin D whistle
Susato low E and high D whisle
Nice collection 
Nice collection. That MK pro is a lovely sounding instrument. Gwen Grace does wonders with it.
The pic is a bit blurry but it looks like the Goldies are stamped “C” and the Susatos are stamped “D”.
Could you post a clearer photo? Thanks!
it looks like the Goldies are stamped “C”
In fairness,rotate the photo 90 degrees counter clockwise and it’s clearly a ‘D’
[inserted image]
And a 7th hole on the silver D
Whit the 7th hole I can play C nat. The whistle has also an hole on the back, you can see it in the picture below, to play F nat too. So it is like a “double” whistle that you can play both in the key of D or in the key of C.
Goldie make these kinds of whistles.
For low whistle, hope that this picture is more clear.
