Upgraded 128k or 512k Macintosh?

[j2theLj]

I have two Macintosh Plus machines with the pre-Plus front. Is there any way of knowing if these are upgraded 128k or 512k machines? The back and the logic board was of course replaced in the Plus upgrade, but was the front or the analog board any different between the 128k and the 512k?

 

[Nixontheknight]

the front should be the same. There is a label near the brightness knob, and if it says M0001, it was a 128k, and if it says M0001W, it was a 512k

 

[unity]

And to add that the Plus had its serial on the very bottom. So if there is a serial under the front chin but not underneath at the bottom then it was likely an official Apple Mac Plus service upgrade kit. If there is two serials then it was likely a cobbled end user upgrade.

 

[j2theLj]

the front should be the same. There is a label near the brightness knob, and if it says M0001, it was a 128k, and if it says M0001W, it was a 512k

Thanks, it actually neither says M0001 nor M0001W, I’m attaching some pics. On a different note, I find it interesting how these are different from one another…

 

[j2theLj]

And to add that the Plus had its serial on the very bottom. So if there is a serial under the front chin but not underneath at the bottom then it was likely an official Apple Mac Plus service upgrade kit. If there is two serials then it was likely a cobbled end user upgrade.

Right, there’s no serial number on the bottom, so it must be official upgrades on both. Interestingly the logic boards on the upgraded Plus machines are different from regular Plus machines that I have: the serial ports have black plastic inside instead of the regular white. This would indicate that separate ‘upgrade logic boards’ were made for the Plus.

 

[slomacuser]

You have European models, the M0001P indicates 220V power supply and the M0001D a education model? I think

 

[j2theLj]

You have European models, the M0001P indicates 220V power supply and the M0001D a education model? I think

thanks, interesting. Makes sense to mark non-US voltage if made in the US, as stated on label. Would that be European 128k then? Assuming 512k would be M0001WP/M0001WD?

 

[slomacuser]

Your (M001P), with serial number F4341VUM001P, was the 2170th manufactured during the 34th week of 1984 in Fremont, CA.

Your Macintosh ED (M0001D), with serial number C6210KSM0001D, was the 672d manufactured during the 21st week of 1986

Early Mac Serial Number Decoder

Early Mac serial number decoder

macfaq.org

 

[j2theLj]

Excellent, thanks!

 

[mg.man]

Your (M001P), with serial number F4341VUM001P, was the 2170th manufactured during the 34th week of 1984 in Fremont, CA.

There is a typo in the serial - missing a "0"... here's the full decode :

Your European Macintosh 512 (M0001P), with serial number F4341VUM0001P, was the 2170th manufactured during the 34th week of 1984 in Fremont, CA.

So both were originally Macintosh 512k models.

 

[mg.man]

Interestingly, the other decoded that's out there - http://myoldmac.net/FAQ/Mac-Serialnumber-decoder-e.php - identified the erroneous "M001P" as a Plus, which had me thinking 'wow, is this a really early Plus?'. Then I spotted the missing "0"...

 

[j2theLj]

There is a typo in the serial - missing a "0"... here's the full decode :

Your European Macintosh 512 (M0001P), with serial number F4341VUM0001P, was the 2170th manufactured during the 34th week of 1984 in Fremont, CA.

So both were originally Macintosh 512k models.

Thanks, I missed that!

 

[j2theLj]

Interestingly, the other decoded that's out there - http://myoldmac.net/FAQ/Mac-Serialnumber-decoder-e.php - identified the erroneous "M001P" as a Plus, which had me thinking 'wow, is this a really early Plus?'. Then I spotted the missing "0"...

Nice with the serial number breakdown with this other decoder

 

[j2theLj]

I’ve looked a bit closer into this and according to the serial number decoding the older was made in week 34 of 1984 (August) - isn’t that just before the 512k was launched? I guess it could have been manufactured just before official launch date. One decoding site specifies it as 512k but the other one has 128k/512k.

 

[unity]

The one with the serial starting with a C tends to make me think it was make in Cork, Ireland. The education models where def more a European thing. On lake Macs, CK serials indicated Ireland make which was reflected on the main label - its why some Macs, like the Iici or Classic, had a sticker over the moulded in regulation info.

 

[j2theLj]

The one with the serial starting with a C tends to make me think it was make in Cork, Ireland. The education models where def more a European thing. On lake Macs, CK serials indicated Ireland make which was reflected on the main label - its why some Macs, like the Iici or Classic, had a sticker over the moulded in regulation info.

Ok, it makes me wonder if there was a need to disambiguate Cork with some other place of production on C.

 

[unity]

Well F was for Fremont and S for Singapore. Apple often identified production locations using the serial.

 

[Nixontheknight]

Your (M001P), with serial number F4341VUM001P, was the 2170th manufactured during the 34th week of 1984 in Fremont, CA.

Your Macintosh ED (M0001D), with serial number C6210KSM0001D, was the 672d manufactured during the 21st week of 1986

Early Mac Serial Number Decoder

Early Mac serial number decoder

macfaq.org

the second decoder that @mg.man showed says the ED was manufactured in Cork, Ireland
Your Macintosh 512K ED (Educational version) was the 672th Mac manufactured during the 21th week of 1986 in Cork, Ireland.