Revue Light Meter Minolta Light Meter Junk Item Vintage

This is a light meter that was used by a relative who loves cameras.

The battery cover is missing, and since I don't know if it works, I am listing it as a junk item.
Comes with a serial number.
Size:
Approx. 12 x 6 x 4 (cm)
I have no idea of its use, so I looked it up on Google.

The following is from Google:
This is the Minolta (now Konica Minolta) View Meter 9, their first standalone light meter.
It was released in 1966.
Minolta VIEW METER 9

Purpose:
Used to measure the appropriate exposure (shutter speed, aperture, ISO sensitivity) when taking photos with a camera.
Features:
This is an analog light meter that supports both incident and reflected light measurement.
Dials:
It has dials for setting shutter speed, aperture value, and ISO sensitivity (ASA/DIN), which are adjusted based on the measured values.
EV Value:
The exposure value (EV value) is displayed, and shooting settings are determined based on this.
Availability:
Currently out of production.

This is a Revue brand light meter.
A Revue light meter with a circular dial for DIN/ASA sensitivity display.
Comes with a serial number.
Size:
Approx. 7 x 4 x 1.7 (cm)
The needle on this one moves, but since I don't know if it works, I am listing it as a junk item.

I will pack it compactly.