On the wright's website butterfly can be graded up to a grade 2 bat.
You can get amazing clean straight grains with the stain on the back. Not often but occasionally.
Mostly they should be lower grade bats, but if you can try a few and find one you like, bargains are there to be had.
This is why I choose a batmaker who makes handles I like the shape of then I choose of the rack in my weight range.
This year my spikes cost more than my bat though... 😲
From the JS Wrights' Web site
Butterfly Stain
This is “Butterfly Stain”, so called as it resembles the wings and body of a butterfly. It is attributed to pruning and frost damage, especially by hard pruning of larger branches that causes scarring in the timber. (Found in our own research and confirmed by the Forestry Commission). Although most people do not understand the butterfly stain, it adds strength to the finished bat, giving longer life of the bat with much less likelihood of the bats breaking.
A GRADE 1 BLADE
A Grade 1 is the best looking blade, though it will not necessarily play the best. There may be some red wood evident on the edge of the blade. The grain on the face will be straight and there will be a minimum of 6 grains visible. There may be the odd small knot or speck in the edge or back but the playing area should be clean.
A GRADE 2 BLADE
A Grade 2 blade is also very good quality and normally a larger amount of red wood can be seen on the edge of a blade, this has no effect on the playing ability of the bat it is purely cosmetic. Again there will be at least 6 straight grains on the face of the blade with maybe some blemishes, pin knots or “speck” visible, we also put the top 2% of the excellent quality butterfly blades that we get into Grade 2.
A GRADE 3 BLADE
This is a middle grade that is produced in much higher numbers than the top grades and it offers very good value for money. A Grade 3 Blade has up to half colour across the blade which again has no direct relation to the playing ability of the wood, it just has less visual attraction. There will be a minimum of 5 grains on the face of the blade which may not always be perfectly straight. Again some small knots or butterfly stain may be present with sometimes more prominent “speck”.
A GRADE 4 BLADE
A Grade 4 Blade is normally over half colour or contains butterfly stain (see our page on Imperfections in Willow). It will still play as well as the other grades. Any number of grains are possible with often only 4 grains, the willow containing ‘butterfly’ stain is very strong, there could also be more “speck” and other faults.
This is the most consistent approach to grading.
What it doesn't talk about is low density willow.
Or any mention of grade 1++?+++? Willow, which is nonsense marketing speak.