In Britain, picture sleeves for singles didn't really become common until the late-1970s, pioneered by the punk and independent labels. In the rest of Europe, however, picture sleeves were standard throughout the decade. This is a fairly random collection of a couple of dozen, most of them bought when I lived in Germany (which is why the labels may not be what you'd expect).

Click on thumbnail to enlarge.

Dandy in the Underworld	Hello Hurray	Teenage Lament '74	Foxy, Foxy
Hypnosis	Red Dress	Devil Gate Drive	I Can Do It
Do You Wanna Touch Me?	Hold Me Close	Lamplight	New York Groove
Sunday	Sheila	Only You	Hotlips
Here Comes The Weekend	Dr Love	Lightning Strikes	Brand New Bagpipe
Boogiest Band in Town	Forever and Ever	Don't Take Your Love Away	Put You in the Picture