![](http://3.bp.blogspot.com/-dXABgjNri1k/TrFVCT4_v9I/AAAAAAAABM4/qMZ5jbewCdA/s280/Crim+Jacket+Back.jpg)
The sleeves has three matching gray fabric buttons at each cuff. The jacket has only one button high across the waist, and it looks like it's a double style where the other button should theoretically go through another buttonhole on the other side. He has a welt pocket for his white handkerchief on his left breast. I'm sure there are people who have studied this far more than I have and welcome any comments below.
It's usually not too hard to find a vintage sport coat pattern on eBay - the collar is easy enough to extend, but look for the vents in back.