Rebadged FED 4b for Foto-Quelle, West-Germany.

This version has a white silkscreened Revue 4 logo on a plastic plate.
It was equipped with Fed/Industar-61 zebra.

Foto-Quelle catalog Winter 1972/73, page 32:

DM 149 camera with Industar-61

DM 24,50 case

DM 99 Jupiter-12

DM 159 Jupiter-9

DM 119 Jupiter-11

DM 69 Uni-VF

http://www.collection-appareils.fr/gestion_catalogue/html/affichage_une_page?chemin_image=http://www.collection-appareils.fr/gestion_catalogue/images/1424009730.jpg&id_catalogue=1116344&nom=Foto-Quelle&annee=1972-73%20hiver&page=32

The pictured camera is type-2b from fotoua.com.

Known serial number range (please extend the range with your serials):

7-digit serial number on the backside of the top:

#8590214(fotoua.com) to #8677606(fotua.com)

6-digit serial number on the bottom plate of the back door:

#??????(source) to #??????(source)