Now after opening both machines it seems pretty clear that my 512k is an upgraded one. The tube and the board beside the tube are definetly from the 512k and so is the front housing; mainboard and backside housing is from that Plus upgrade which also contains the 800k floppy drive but not the extended keyboard.
One thing is still a bit strange: while my Plus shows all the signatures on the inside of the beige backside housing the "upgraded" backside housing from my 512k is missing these signatures and is held in black, it also misses any further engravings that my Plus shows but it is definetly a housing from Apple.
I think I will exchange the mainboards. My Plus has 4 MB RAM, the 512k/Plus just 1 MB. The Plus also faces the video dropouts which the 512k doesn´t show. So when I´m reanimating my old Plus webserver the 512k will be a bit more "special" for this job, I suppose
J
One thing is still a bit strange: while my Plus shows all the signatures on the inside of the beige backside housing the "upgraded" backside housing from my 512k is missing these signatures and is held in black, it also misses any further engravings that my Plus shows but it is definetly a housing from Apple.
I think I will exchange the mainboards. My Plus has 4 MB RAM, the 512k/Plus just 1 MB. The Plus also faces the video dropouts which the 512k doesn´t show. So when I´m reanimating my old Plus webserver the 512k will be a bit more "special" for this job, I suppose
J