If this is red scale, it is exactly the camera i bought in 1957 (paid by my generous brother, 14 years my senior . . ha passed away in 2009.) The combination of Elmar 5cm/3,5 and ADOX KB 14, developed in NEOFIN BLAU was sensational. Nominal sensitivity was 14DIN = 20 ISO/ASA, and NEOFIN BLAU would raise the speed to 17 DIN = 40 ASA/ISO (one stop) without increase in grain. The sharpness of this B&W film was comparable with Kodachrome. It is a real gem you've got yourself there. I'll never forgive myself for exchanging it after only a year, with a Rolleiflex 6X6.