Archived posting to the Leica Users Group, 1998/04/26

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Subject: Re: [Leica] A "real" meter
From: LEICAMAN56 <>
Date: Mon, 27 Apr 1998 00:32:36 EDT


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