If you have one to sell PM me - thanks.
This is probably a dumb question, but, how do you know if you have a medium blower?
Size of the mouthpiece opening is a big factor - smaller opening - harder blower etc - ps - there are no dumb questions - only dumb people 
My soprano D Goldie is stamped ‘S’ for soft blower according to the Goldies. Don’t know if all Colins whistles are labeled/stamped with “back pressure rating” though, mine is anyway.
I don’t think any of mine were. Where is the letter S stamped?
Near the bell end, opposite the key stamp.
I think there are too many variables in Goldie whistles for Colin to give them a general stamped rating.
That said my Goldie high D made in January 13 is engraved next to his name on the inside
of the body .8
Colin tells me this is a hard blowing whistle but also the size of the window also makes a
difference to how they play.
One of the things I like about this hard blowing whistle is the volume balance between the
Octaves, I tried a soft blower at the same time and it didn’t have the same balance.
To try and answer Mikethebooks question, it’s all relative 
Interesting stuff! I’d never noticed the number inside the whistle at the bottom end. I have two Low Ds, the standard soft blower which shows 0.97 (mm) and a slightly softer blowing whistle, 1.00 (mm). I’m now curious to know what numbers are shown in medium and hard blowers for those that have such Low Ds. The differences in windway height are so small, it’s amazing. I do know that Colin makes a 1.1 mm and 1.2 mm soft blower. Goodness knows how they play!!!
As I understand it, for a low D, .8 mm is typical hard blower, .9mm or therabout is a medium blower , .97 mm would be a soft blower as Mike says. Don’t know about other keys.
Okay! But the 0.97 I quoted was for a Low D. Narrowdog quoted 0.8 for a High D hard blower. I would assume that the windways will be shorter for a High D than for a Low D but maybe that’s not the case. Do those numbers apply across Colin’s range of whistles? Or are the numbers different depending on the key of the whistle?
My low D has a similar wind way height to my high D
and I would describe the low D as a medium blower.
As I said earlier this is all relative, I picked the low D from the way
Colin described it over the phone and how it sounded to me.
I haven’t got another Goldie low D to compare it to just a 10 years
old Cheiftain NR and that has a height of 1.0mm and is a much easier
blower.
All I’ve done is got what I think I like and worked with it.
Ive had my hard blowing high D for 6 months now and still working at it,
It’s not easy but very rewarding.
I looked at my Overton last night and on the inside of the tube there was Colin’s signature and this marking:
https://www.icloud.com/photostream/#A4JtdOXmJsXExK;FEBFD7D6-7686-46B2-9130-B3C77ABBCAE3
Any idea what the first bit is? I’m guessing 2002 is the year is was made.
Pete
It’s April 2002, I think. I’m pretty sure. Yes, the month and year it was made.
Ahhh, could be. I was wrapped around that being a 2 at the beginning. I can see that it could be an A. In fact, I now can read the word as April with that change in view point.
Thanks!
Of course, I still don’t know if I have a medium blower that might be of interest to Retired. A set of feeler gauges puts the wind way opening between .915 and .94 mm so, I guess, this falls on the medium side of the soft-medium spread.
You don’t have a number etched a little further round after the date?
Nope. Just Colin’s name and the date.
Hm. That must be a more recent innovation then. But at least the feeler gauges provide a guide.