Originally posted by: badinsults
I'd be surprised if the Zelda prototype you had was much different from the Japanese version (which came out in November 1991, same as the date on the chips). The Sim City one is kind of weird because each chip has a different date on it. Both are prior to US release (since the SNES came out in August or September 1991), but after the Japanese release. The checksum on the chips does not match either the Japanese or US release.
The jap version of zelda on sfc was released on 11/21/91.
On your cart the date is 11/22/91.
Is your game jap or us?
can you test it and try to give us some difference comparing to us version perhaps ou jap maybe...? please