Scraps from the Past - 1940s Snug Jerkin with Trapunto!

I think this is a gorgeous pattern for a very snug jerkin (vest), decorated with cables using your choice of hand embroidery or trapunto - wonderful techniques! From 1941 and McCall, the hip-length jerkin offers 3 neckline variations, so you can have fun making more than one. :)

Tucked inside was the "V" cutout for view C, in a soft dark navy blue wool. It's a nicely woven fabric - be sure to click on the image for a close-up view. The transfer is partially used (only view C is unused). I wonder which technique our mystery seamstress used - embroidery or trapunto?

Can you picture it?