Hi Rod/Justin,
as I've mentioned, I'm a bit stubborn regarding the violet mutation. Now, I agree fully that the pictures Rod have shown is indeed one of a variety of strains of violet, but I have found (actually still do) it cumbersome to explain to breeders investigating the potential of violet that the bird 'will' give violet offspring in the double factor (proving it is violet). Here is a picture of a hen with another strain of violet. Note that this is a single factored bird.
Here is a similar bird in ADM pied. Again, a SF violet, not DF.
Like I say, you'll know a violet bird when you see one. And when in doubt and if it does look like a cobalt when SF violet, it remains the decision of the buyer, I suppose, whether the bird is 'violet enough'. I'm a firm believer in the innocence of youth. To me, the test on the quality of a bird/mutation is to take a five year old and to ask them what they see. Regarding the violet mutation, the hypothetical child should say, 'Look mom/dad, thats a purple bird!'. And a 'WOW!' would also be very nice.
And please everyone, no offense intended at all! I've had some breeders very upset with me and my opinion regarding this very topic. I'm not saying you're birds aren't violet. I fully recognise that more than one strain exists.
@ Madas, you might enjoy the blue cock in the first picture. Unfortunately, that hen nearly killed him some weeks ago. The cock is now with a violet daughter of that hen.