820-0605-A same as the sticks that I have, but I have been researching and found something I didn't previously know.
The chips mounted onto each stick has a long number stamped across its centre, the end of the number is always in the format of -xx or -x where x or xx are digits. These digits refer to the speed of the chip i.e. -8 would indicate 80ns speed.
Of the 4 sticks of 512kb VRAM I have recently bought 2 have -10, one -8, and one -7.
I am guessing that as the LC475 requires a pair of 80ns VRAM sticks I currently do not have the correct specification.
Why would 3 different speed sticks all have the same part number stamped onto them????
Is Apple trying to confuse me or am I just missing something here?