Miniature Scout Knife

I got this knife among many others from my great grandfather before his passing. I have always been curious about it, and happened to see it this morning and thought I could find out about it to no avail. Over the years I have shown it to many people and noone seems to recognize a knife like it, or where/when it may have originated. I apologize for the pictures, I unfortunately don't have any type of camera other than on my phone. Its measurements are 1 inch long closed, and 1 3/4 inches long opened. The casing appears to be plastic, and the blade is some type of thin metal.