Welcome to the board!
If you don't mind paying for it, maybe one of these will work for you?
https://manualsoncd.com/product-cate...ction-manuals/
There may be other sites online where you can find one for free...don't know
Here is a little info for you about your Dressmaker:
https://silverbobbin.com/dressmaker-...achine-models/
and you may find other enthusiasts and/or more info here:
https://www.victoriansweatshop.com/
and this site offers a lot of info if you know the manufacturer:
https://ismacs.net/
https://ismacs.net/free-sewing-machi...uals-list.html
have fun
