Try singerco.com - Put Instruction manual in the drop down - then put W1599 in the search. You can find most white brand manuals just put a W before your model #.
1927 white sewing machine manual
I have a White Jean Machine Model 1599. I need a User Manual free download. Where can I get it?
You can go to White's web page whitesewing.com & go to customer service. Ask them for a manual and explain your problem. They'll send you one for free (I think) via PDF download.