I have 2 copies of Blaster Master for NES and 1 happens to have a round black seal of quality now all the revisions mentioned on this site:
http://bootgod.dyndns.org:7777/profile.php?id=168
say it has an oval white seal, which my other copy does have so what is up with this copy with the black seal? I'll provide pictures in a little my camera's battery is charging.