APPLE //c question

Yesterday I opened my Apple //c to take a picture, and I found something strange: On the OS _EP_ROM is a batch to close the window, handmade with the text "NOV 30, 83" written on it. I always thought that the //c was released in april '84 and first in the US - but this is an ordinary (at least I think) german //c. There is no information sticker on the case, so no serial number or exact modell information is available (I forgot to check the revision number on the mainboard). The character generator is also 'only' an EPROM, but the sticker on the window is premade (paper) with a copyright notice (APPLE 83). So, is this maybe some kind of early pre production series for tests in Germany ? Gruss H. -- Ich denke, also bin ich, also gut HRK