Hello, Nancy -
You can find the manual (a PDF document) on the Singer sewing machine company website to download for free:
https://www.singer.com/search/support?lp=support&title=15-90You will need Adobe Acrobat Reader software (free) installed on your computer.
Once you download the PDF document you can save it to your Documents folder using a name you will remember easily -- something like "Singer 19-50". :)
Once the document is saved, you can, if you wish, use your Adobe Acrobat Reader software, the Fill & Sign tool, to add the following information on the cover: URL and a note indicating that the manual is also for the 15-90 manual. The image of the cover page only states it is a manual for the 15-88 and 15-89 models.
Best wishes.
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