The Book says, “Attaching a collar with front and back facings is otherwise known as the sandwich method.” Who knew? “…[the] collar can be sewn into the neckline at the same time the facings are sewn into the neckline.”
Let’s make a neckline sandwich.
-Prepare the collar of your choice
-Sew garment at shoulder seams
-Sew on facings, but NOT to the neckline/shoulder seams/collar area. Basically, just to the front opening of the garment.
Now take that facing and pull it up and over the pinned collar, wrong side of the facing out. Match up all the important points again, this time including the raw edges of the facings. Re-pin one pin at a time with all layers now.
Look what you did!