[no subject]

Yes, timing is set at 5deg BTDC per Bentley. It's the third mark from the 
left.
The spark advance curve for the 311 905 205L distributor can be found in the 
fourth edition (copyright 1972) of the Elfrink FI Technical Manual on page 42.
This dizzy (quoting Elfrink) "...is a conventional single breaker type with 
combined centrifugal and vacuum advance." Short answer - it's a single vacuum 
advance.
And, yes, I checked the advance with timing light.

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