I love this pattern it's vintage, long darts front and back and fits perfect too with my alterations to the shoulder width where my arms are. I add an inch there. Pattern is Butterick 8479 from the 50's I'd say.
This is a modern pattern. I kind of have the sleeves pushed up here, the cuff has a split and I think I have them about 1" too long, I can turn them up there perhaps. The lining is the black dots and I used a modern pattern using black wool gabardine. The pattern has princess seams front and back and there is a seam down the back as well. Nothing special or spectacular about a black blazer is there.
* We had snow today while sitting in church, oh when will it all end?