That's certainly around the correct time, but I'm certain that isn't the e504. My problem stems from the fact that I'm fairly certain I saw the E504 online (at a 50s autoshow), but didn't know what it was as it wasn't captioned. Then I discovered the e-codes for BMWs that described the E504 (in German) as a 4-door 3 meter wb version of the 503 and decided that must have been it - then I couldn't find the picture again! So that's my dilemma. Incidentally, what car are we looking at in your photo?
Thank you!