I want to say the breeder said m-l eggs, but I think they are dual purpose.
The breed club site says
light bodied dual purpose and med eggs for first year, but lrg the following yrs
They’re heavy! Heavier than the orps and lorps right now.
I learned about double barring from chickats project with Jim and the hens. In some of her generations the cocks were single barred and hens weren’t barred at all. Actually, two of Jim’s sons that hatched, one was barred and one wasn’t.
In chickens, the female carries the short sex chromosome, so her pair of sex chromosomes is like a pair of shoes that has the toe missing from one shoe. All her other pairs of chromosomes are equally matching. The barring gene is sex linked (meaning on the sex chromosome, at the end which is missing in the females) so at most, a hen can only get
one gene that causes white bars to form. Males (with 2 full sex chromosomes) can get 2 barring genes or one, or none, depending on their breeding. 2 barring genes produce a white bar that is twice as wide as a single gene can produce.
The pictures show pairs of chromosomes for 3 different chickens. One chromosome came from the father and one from the mother, to make up each pair. Every pair has equal lengths, except for the zw pair, where sometimes the w chromosome is shorter. The top picture shows rooster DNA... zw are the same length. The middle and bottom pictures are showing females... see the shorty w for each? That means the hen is missing some DNA (genes) that is found on the short end of the w chromosome.
The barring gene is on the zw pair of chromosomes at the tip where the genetic material is missing from the w gene. This is how sexlinking works. Any genes on that missing bit of w are sexlinked... feather color is just one that can easily be seen.