From the link in my post:
-5 EV

Profisix Lunasix F Lunalite
Type Null pointer hand held exposure meter
Introduction 1977 1981
Sensor SBC (Silicon Blue Cell)
Measurement Ambient & Flash* Ambient
Sensitivity -5 to +24 LV -1 to +17 LV +1 to +17 LV
Display -3 to +3 EV Pointer 3 LED
Film Speed ISO 0.8 to 100,000
Aperture f 0.7 to f 128
Time 1/4,000s to 8 hours
Power 9v Battery
Dimensions 120 x 44 x 70mm
Weight 250g 195g 170g