The 319W was Singers answer to an "industrial" domestic. It is a work horse and can do all sorts of nice stitches.
I had one I found on CL Mobile but when my niece went to pick it up for me her MIL was with her and went bonkers when she saw it. She had lost the one she received as a wedding gift to a house fire so I told her that she could have it. It was super clean and was only used to sew a set of curtains when the lady bought it new. Easy come, easy go....
When it comes time for you to clean the machine up use Go-Jo non pumice hand cleaner and lots of cotton balls and Q-tips. It takes a while but the results are phenomenal, then you can use a good carnuba automotive wax to polish it.
Congratulations on your new old machine!!!
Billy