Looking for info on an older serger
 

Hello you good folk! I just bought a Riccarlock RL-340 overlock serger sewing machine on eBay. It hasn't arrivedhttps://photos.app.goo.gl/ixScZ3ZbuD8iWRmv5https://photos.app.goo.gl/ixScZ3ZbuD8iWRmv5 yet but I'm wondering if anyone here has any information on that type? My internet searches are coming up fairly dry other than a printable manual and 1 YouTube video. Does anyone here have any experience with this model? I bought it fairly cheap and I wanted it because it is a heavy metal/vintage type one. No plastic sewing machines are allowed in my house ;)
I'll try and attach a picture, hope it works.
https://photos.app.goo.gl/ixScZ3ZbuD8iWRmv5

https://photos.app.goo.gl/9Cj9PWfysVvuuCPy7
https://photos.app.goo.gl/9Cj9PWfysVvuuCPy7