Lapped Seams: A Common 1940 Technique

I'm still progressing on McCall 3638 and the bodice calls for lapped seams:

Especially on the yoke:

Here's a close-up of the lapped seams I have been working on for McCall 3638:

There was also a lapped seam action going on in the McCall 1940 sundress I made, specifically on the set-in belt:

I like lapped seams though I must say topstitching still makes me nervous :-)