I’m going through old cables and get the impression that this is for a specific product, but I can’t tell what product it’s for.
I’m going through old cables and get the impression that this is for a specific product, but I can’t tell what product it’s for.
It is definitely 7 pins, not 9. The pin layout matches this image on the wikipedia page for mini din: https://commons.wikimedia.org/wiki/File:S-Video_7-pin_quasi-DIN_connector.JPG#/media/File:S-Video_7-pin_quasi-DIN_connector.JPG
I tested the pin connections and it does match the “compatible with an S-video… plug” in the image’s caption, but I don’t know if the keying allows for that. The key on the 7-pin is both wider and thinner than on the 4-pin.
The fact that this is a long cable instead of a short adapter does give me the impression that both the 4-pin mini din and the rca connector are supposed to be used simultaneously.