Revueflex E is a rebadged Zenit E by Foto-Quelle, West-Germany.
The pictured camera #67041122 is possibly from the first batch.
While this camera was ordered by a company from West-Germany it was bought in US. On the catalog is written Foto-Quelle international.
Camera distinguished by all engraved letters and numbers, even on speed dial. It's made with better overall quality then Zenit E. Carrying case is different then on Zenit E, most likely is made outside the USSR and fitter to camera before sale.
Foto-Quelle catalog 1968, page 10/11:
camera DM 229,00
case DM 14,50
Foto-Quelle catalog 1969. page 10:
camera DM 249,00
case DM 14,50