The pattern is from the Japanese pattern book Les Couleurs Francaises. I'd post a link, but can't find anything other than a handful of blog posts. Which is unfortunate, because it's quite a nice pattern book. It's mother-daughter patterns, with lots of matching or similar styles. They're all fairly safely classic and feminine, so they're unlikely to become too obviously dated. It's worth picking up if you ever see it.
The fabric is a poly with a nice drape. I bought it on a trip to Cabramatta with the Sydney Spoolettes. I think it cost $5 for a metre, which is actually mid-price range for Cabra. The number of fabric stores there make it well worth a visit. The quality of fabrics is variable, but given you can get things as cheap as $2 a metre that isn't surprising. And most of the fabric is pretty good quality.
Being poly the fabric is easy to care for and doesn't seem to crease. However it can fray, so as usual I did French seams to give it a cleaner finish. I also stitched down the yoke seams, both to keep it neat and flat and to highlight the yoke. I didn't have much of the off-white thread I used as topstitching left so all the inside stitching was done in white At first I worried that the topstitching thread might still be a bit too white, but in the end it doesn't stand out much, just enough to accentuate the seam but not so much that you look at the line.
In the pattern book this top is worn untucked, but in most of the photos I've worn it tucked. I think it works better for this fabric, and as a blouse to wear at work I think tucked in is neater too. Although it possibly could stand to be an inch longer, or I could wear it with higher waisted trousers or skirt. But overall, I'm really happy with this blouse and think it will get lots of wear.