This may sound a dumb question, but what is a stencil? over here in the UK, it is a piece of material, can be card,plastic or metal with a shape, latters or numbers cut in to it. You then use that to draw the required shape.
Now this looks like something that may have been drawn with a stencil, does the word have a different meaning in US and UK English or in GB English does it also refer to what is produced.?