40+ years old. Needs some love, a CLA from your repairman. And before you ask where to find someone to work on it, go to the Nikon website and look at Authorized Repair sites. Not Nikon repair, they won't touch it.
I know you said you didn't like shoe mounted meters but the MR-4 is the perfect meter for it. Couples to the SS dial and meters heavily to the finder 90mm rectangle.
My M4 is very reliable and DAG has serviced it. Do you mean say it isn't? The MR-4 meter takes mercury batteries, DAG serviced mine and replaced it with an available battery.
I have three black MR-4 meters. One stays on my M4. And they may be old but they are very accurate and reliable. DAG repairs them and will convert them to a 625 (I think) for $90.
Looking at a Leica M-A in the classified ad it looks like the shutter speed dial is milled to connect with the MR-4. Can anyone confirm the the MR-4 meter will fit and couple on the M-A?
JB Weld, I've used it on about everything, cast iron engine blocks, motorcycle aluminum engine cases, etc . Not brittle at all both aluminum and cast iron changes dimensions when the engine is heated up and JB weld holds very well.
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