Meyer Rangefinder, more information please?

[Arreo]

Someone on Reddit found this Meyer Rangefinder at Goodwill and didn't know what it was or anything about it. I could recognize it as a rangefinder, likely large format, and that it appears to be from Meyer Optik.
http://imgur.com/a/yUx9F#SKlv0Ww

My thoughts are, the Meyer logo on it doesn't seem to be like any Meyer logo I can find, anyone else seen something like it?

It absolutely looks like other Meyer rangefinders (see this Ebay batch for one that looks very close.)

Why does it have a leather case made in Japan between ~1947-1955 when Meyer is a German company?

What camera do you think this came from?

(My background with LF is my parents are 4x5 people who did photogrammetric documentation of historical building and structures.)

[jbenedict]

These were sold to owners of cameras which had no calibrated way to determine focus. The rangefinder was used to approximate the distance to the subject and that measurement was transferred to the lens.

I would guess this would be used with a smaller format- either 35mm or MF. LF usually had GG or RF and frequently both.

[Jim Jones]

I suspect is one of the many Japanese rangefinders made for cameras that focused by scale. The name probably has no official connection with the German maker of rangefinders.

[Jac@stafford.net]

As mentioned earlier, it is a rangefinder mainly for for MF such as Ikontas (not Super Ikonta) and 35mm. The thing on the bottom slides into the camera's accessory shoe, if it has one.