Unique numbers on generator pulley

[bnam]

Examples have been posted upto 1964. Any examples from 65 or later?
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1971 1302LS Convertible (RHD) owned since '74
Click to view image
1965 Karmann Ghia Coupe - under restoration
1966 Fiat 1500 Cabrio (with 1600 Twin cam)
1952 Citroen TA 11BL

[gt2]

Another example of a generator pulley with '1-35' odd numbers visible. As found on a 104k km 1962 beetle in very nice original condition.

[marknmelcom]

Fibonacci Sequence ? (Ha-Ha!)

https://en.wikipedia.org/wiki/Fibonacci_number

/M
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'67 Beetle - 'Winnie'
'75 Std. Beetle - 'George' - moved to a new owners house
'13 Golf coupe - 'Bitter Bunny'
'15 Tiguan 4mo - 'Tig'

[House]

Still not sure what they are for… And it seems all cars didn’t have them..?
Here they are on a low mileage 63:

And on the lowest mileage car known, a 64:

[pastellgreen]

Also found these numbers on the generator pulles.
I read 27 29 31 33 35

Still a question for what these are standing for

[Snort]

OK, this is totally speculation and faded memories but I seem to recall reading that VW balanced the generator/fan/pulley assembly by adding weight to the outside pulley half, like the weight shown in my photo above. I don't see how that much weight on such a small diameter pulley would be an effective balancing mechanism but maybe those fans were really close to being balanced and it only took a little but of weight to make them run smoothly. I'm not sure how the numbers would work into that but maybe John Moxon's Judson rotor balancing theory would fit into this.

[Eric&Barb]

Wonder if the factory unit of pulley and armature of the gen installed in each VW were balanced together??
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In Stereo, Where Available!

[John Moxon]

This reminds me of the numbers to be found on Judson Supercharger rotors. They were balanced on a Gishault Balancing Table. The end of the rotor had numbers printed on it and the numbers illuminated by the strobe light on the balancer indicated the area where metal had to be removed to balance the unit.

You'll only find these numbers on a NOS rotor as gas washed off the numbers very quickly.

However I can't imagine a generator pulley would need to be balanced.
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John.
Judson Supercharger Information on The Samba
My 1958 Shorrock Supercharged Karmann Ghia
Stop dead photo links! Post your photos to The Samba Gallery!

[Snort]

Moved from the Ghia zone.

Here is a photo of a 40hp generator rear pulley half. It's from a 1962 Ghia engine which from all appearances it seems to be a relatively unmolested July 1962 motor.

[bnam]

[Eric&Barb]

[vwfreek61]

[panicman]

Careful guys, if you run the engine backward, you’ll hear a satanic message.

[Smurf]

[mukluk]

[Eric&Barb]

[KTPhil]

[h~moto]

[iowegian]

[Eric&Barb]