>>44415161I'm afraid that is a bootleg. The actual cart (which I still have from my youth) says "MADE IN JAPAN" and "PAT. PEND" up near the top and the screw is down near the bottom rather than in the middle as it is on yours. Yours is also missing the "MADE IN JAPAN" on the front and the Nintendo Seal of Quality logo.
On the plus side it seems to play fine and bootlegs use flash to save instead of RAM, so you don't need the internal battery and therefore don't have to worry about changing it every 10 years.