Vintage Sekonic Studio Model S Exposure Light Meter & Leather Case Made in Japan

This vintage photography light meter is by Sekonic Studio, aka Sekconic Electric Inc. It comes in a really nice velvet-lined shaped leather case with zipper closure. The unit has a strap attached to it as well as being magnetic. The unit and case are both made in Japan. I'd estimate it dates from the 1960s-70s era. I do not make any claims as to its operation as I honestly don't know how it works. Physical condition is as you see in the photographs. Measures about 4-1/4" long by 2-1/4" wide.