Joost van der Net has an excellent website on Deutsche Grammophon (DGG), about stereo records manufactured by DGG in its heyday, between 1958 and 1973, including photos of all the different sleeves and labels. He has kindly given me permission to link to his site:
https://www.joostvandernet.nl/classical-music-on-lp/deutsche-grammophon-stereo-lps.html