Archived posting to the Leica Users Group, 1998/04/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]David, Both the MR and MR4 meter are labeled MR on the back of the meter. Both meters are essentially the same, but differ in the cofiguration of the meter activation switch. The MR has a plunger type activating switch protruding from the side of the meter. This is just fine for an M2 or M3, but with the canted rewind knob of the M4 and later cameras, this plunger interferes with the operation of the rewind knob. The MR4 meter addressed this problem by moving the activating switch to the top of the meter. Both the MR and MR4 meters were availabale in bright chrome, black chrome and black paint finish. The switch on the front of the meter is the battery check. If the needle does not deflect down to the silver dot on the scale when this switch is pushed, then either the battery is dead or there is a problem with the meter. As far as batteries are concerned, Saunders distributes a cell called the Wein Air Cell as a direct replacement for the Mercury 625 cell. Hope this answers your questions. Bill Rosauer