Shortly after WW1?

My grandparents. He is in mourning (the war?). She is looking more and more like me ;-) In the background, a gallery of photos of their descendants, i.e. my sisters and their kids.

When I blipped them before (circa 1950?) he's the one with the cap on and she's sitting inside the car.

Thank you to Digpan for giving me the idea of a formal portrait.