This reproduction of the OEM factory decal is located on the dashboard, in the "cross" indentation below the right side of the steering wheel.
Many 240Z's have had the dashboard replaced at some point, and many times those dashboards from Nissan were the 1972 version. So if your 1970-1973 240Z has the "cross" indentation, this is the decal designed for the indentation. Please call if you have any questions.
Beware of scanned copies of these early Z decals on some internet sites. These decals are the actual reproductions commissioned by Nissan, not copies!
1971, 1972, 1973