Hey there, I’ve been enjoying this 70’s era Sekio for a few months now. Always makes me feel like i’m living in the future with the Dystopian 70’s monochrome. I could use some help learning more about it if anyone has any info. I suspect it was manufactured between 75-77 and was offered in this color and a stunning version with a blue dial. It’s a 7009-8069 movement. I have it on an aftermarket bracket as the original stamped bracelet is too small for my wrist. I imagine this was a Japanese only issue. Any info is appreciated!