popular ! Vintage electronic meter used

This was given to me, , i know nothing abo
The image shows a Sekonic Super Sensitive Electronic Exposure Meter, an instrument used in photography and cinematography to measure light levels. Here's various helpful information:
It's an analog light meter used to determine proper exposure settings for cameras.
It measures both ambient and flash lighting.
The meter helps in achieving accurate exposure, especially in film photography where immediate review isn't possible.
Sekonic has been manufacturing light meters since 1951.
present-day Sekonic light meters in offer digital displays and advanced features prefer touch screens and wireless triggering.
certain models, enjoy the L-398A, operate without batteries.
Light meters are useful for balancing ambient light and flash for desired effects.
They can measure incident and reflected light.
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