I picked up this pedal from a local pawn shop for £30; fully analogue chorus that has been discontinued for seemingly quite some time, and have a few questions about it.

Firstly, is there any way I can determine its age? I have a serial number for it, I'm just not sure how I'd go about it.

And secondly, does anyone know where I'd get a manual for it? It's ridiculously easy to use, I just like reading the manual first to see if there are any cool tips/tricks or settings.

Thanks for any help!