That's a Kenmore 90 and you can buy the printed manual here:
http://www.sewusa.com/Sewing_Machine_Manuals/Kenmore_Manuals/Kenmore_90_Instruction_Manual.htm
http://www.tias.com/173/PictPage/3923560703.html buy the PDF
http://www.kenmoremanuals.com/Kenmor...158_Models.htm pdf $9.99. Scroll down to find 90.
Or just Google and a manual may pop up for a Model 90. I got that
Model 90 from this very board, :-)
http://www.quiltingboard.com/vintage...t247496-2.html
The model 90 is Kenmore 158.900, or 158.902, or 158.904. It was made in Japan between 1961 & 1965.
The one listed was lavender. It is an automatic, w/3 way buttonholer, side a loaded bobbin, low shank, oscillating hook and original price in its time was $208.99++Hope this helps,