Upon first glance, it is very similar to my TNT pants pattern, McCall’s 5537, a "Palmer/Pletsch Classic Fit" pattern (see below). The only difference is the Simplicity pattern has a curved waistband whereas the McCall’s waistband is straight. No matter. With a copyright date of 2006, it is now sufficiently aged to finally construct the muslin and see if it works.
Pants - McCall's 5537
I chose an olive colored stretch polyester suiting for the muslin. The fabric came from Fabric.com back in October, 2009. I had previously made pants from McCall’s 5537 using this same fabric in pewter. The fabric is wonderful so I hope this test pair fits.
My sewing things are still being juggled around to incorporate the maybe/maybe not Horn cabinet. Besides installing the Singer 403A, the cabinet drawers have been filled with various tools and notions. It feels as if it has always been here and that makes me smile.