The buttons, which are decorative only, are sweet little crocheted covers over solid bases. (The front placket snaps closed.)
There are three laces on the blouse, a narrow one and two wide ones that have been used together to make a deeper edge for the collar.
It's the two-layer, 3-D flowers that fascinate me!
The shoulder and sleeve seams are delicately faggoted.
I also want to point out the choice of color for the little neck bow. I think in today's market, the bow would be in a matching satin. The use of black really speaks to the vintage styling of the blouse. It's similar to the antique quilts that I am familiar with, where the use of black as an accent to pastels is very much a color choice of the 1920s and 30s.
All in all, it is an ultimately feminine little blouse. It's also a great example of detailing making the garment, something that most off-the-rack clothes are lacking these days.