On 18-12-2018 1:43, StephenS wrote:
> On 2018-12-17 2:25 a.m., Thomas de Groot wrote:
> ...
>> An Aztec Calendar is what I would attempt.
>>
> 
> The calendar looks like two rings that slide on each other, or am I 
> seeing it wrong? Gears in stone?
> 

I hate it when I am unable to find back what I am looking for :-/

If I remember well, it consists of three geared wheels, one involute. I 
must have a picture somewhere as I intended years ago to make an 
animation from it. I keep looking...


-- 
Thomas

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