(1) Light Bulb 15 watt, 120 volt, Push in Style, Most Common, 19/32 Base

-New replacement light bulb 

-15 watt, 120 volt, double contact, medium clear glass, push in style,

-Base diameter is 19/32", Length of glass 1 7/16"

-Fits Singer models 15-86, 15-87, 15-88, 15-90, 15-91, 15-125, 1200-1, 201, 206, 221, 222, 301, 306, 319, 401a, 403a, 404, 500a, 503a, 200 series, 300 series, 400 series, 500 series, 600 series, 700 series, 800 series, 900 series, most common size in many older makes and model. 

-Available in clear glass of frosted