Leicameter-MC (1957) Cat. no. 14200 METRA chrome. 2/98 Couples with the shutter speed knob. Fits accessory shoe of M cameras. Flap with slit replaced by switch for two metering ranges. **IMPORTANT INFORMATION ** --->>> Early models have shutter speed range matching the early M3 cameras and are designated in the KEH system as "25/50". --->>> Later models have the new shutter speed range to match the change to the "geometric" progression as updated on later (after 1957) M3 cameras. Designated in the KEH system as "30/60". . Optional Booster cell MBOOW-C or later MBOOC/14202. Optional Incident Mask clips over front.