That's a silk screened bird. The photos are not the greatest, but good enough to show how clean the image is.

If original, the photos don't show it well, the edges of all the white/black should be very sharp and clean.

Chemically etched or sandblasted will feel eroded, be duller gray in color, and will gray more when wet. Reproduction painted or screened will not be as perfect as factory.

Decals are decals...you can find the edges.