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Interesting information from Taneli Lukka (Finland):
Because of the re-design of this machine the sound from the legendary SID-chip is more quiet and dosn't sound as good as the original one. Due to this many people who made music with their C=64 dislike this model.
In my opinion the keyboard is just as good/bad as the original as they are mechanically identical and are also interchangeable so you can easily make a C=64 with the C-model keyboard, only the caps are different. The C-model keys do look messier than the original ones because graphical symbols are now mounted on top of the buttons instead of the side. Only very early production examples have the symbols on the sides.


It seems that there are two completely different C=64c revisions. The one with the MOS 8500 processor and smaller motherboard seems to be the most common. But there is also a version which is either a very early or very late production model. At first glance it is impossible to see the diffirence, but when you turn the machine upside down you can see the first of them: there are no screws to hold case together, just three plastic "clips" in place of the normal screws that you have to push through with a screwdriver to take the machine apart. There is also no model sticker, just an empty slot with the serial number sticker on it, the model text and other info is molded on the case on the right side of the empty slot and this text says that the machine is made in West-Germany instead of Hong Kong like most c-model machines.

The differences come even more apparent as you open the machine. The keyboard is held on the upper part of the case with plastic clips instead of being screwed into the lower part on two metal "legs" like on the more common revision. The motherboard is the old big one with the MOS 6510 and old SID and the power led cable is very long because the led is on the opposite side of the machine when compared to the old "breadbin" C=64 for which this motherboard was designed.

This revision seems to be very rare as i have only encountered one of them and i have cleaned and fixed god knows how many C=64's. It seems that Commodore really tried to save screws when designing this thing, but using the old motherboard which was more expensive to produce doesn't make sense. The machine can't be a shop modification because it is clearly factory made and the smaller motherboard wont fit in the case, i tried.


It seems that i have reached the end in my hunt C=64c revisions.
The specifications for the revision that seems to be the very first one are:
• Graphical symbols are on the front edge of the keys.
• Made in West-Germany
• Case is held together with 3 screws
• Keyboard is mounted on the lower part of the case on two metal "legs".
• The origina bigl motherboard is still used.
• The power supply is like the old "breadbin" model, but made out of cream coloured plastic.

In the end the rarest revision seems to be the second one with no screws. It seems that the new small motherboard didn't kick in until production was moved to Hong Kong so Commodore just used up their old stock of big motherboards in Germany before moving the production. At the same time they seem to have experimented with diffirent case and power supply designs.

From Petrvs (Argentina):
In 1988 a local Argentine company, Drean, mainly known for its washing machines, started to sell the "Drean Commodore 64C". It was basically the same computer as the original 64C but with PAL-N video output.
As most of the existing local Commodores 64 and 64C were NTSC the Drean machine had some "compatibility" problems.

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