Originally Posted by
Wasabi Tofu
In old days XONEWCn, unlimited segments per continent.
You didn't have to purchase extra segments.
Only limiting factors were flying only once between a pair of airports per direction, and 2 STOPOVERS per continent (e.g. loophole).
In my old DONEWC3(ex-NRT), European part consisted of 7 segments like
JNB-xLHR-xAMS-xLHR-FRA-xLHR-xHEL-xLHR-CDG-HKG
O.K, I didn't have enough time to add xLHR-xDXB-xLHR-xFCO-xLHR.
Furthermore, in that time, there was no fuel surcharge.
So, XONEWCn was the best mileage run ticket.
The only reference from the early days that I can find is one in whom I have 100% confidence - me

and my former self suggests otherwise (unless you have a reference pre-1999):
http://www.flyertalk.com/forum/onewo...rer-fares.html
Abridged version:
FARE: RTW QF/ONEW4
GENERAL CONDITION: RWQF1W4
Code Description
Departure City ADELAIDE BRISBANE CAIRNS MELBOURNE PERTH SYDNEY
Airline QANTAS AIRWAYS/BRITISH AIRWAYS/AMERICAN AIRLINES
/CANADIAN AIRLINES/CATHAY PACIFIC/FINNAIR/IBERIA
*
THIS IS THE ONEWORLD EXPLORER-4 CONTINENTS FARE
Fares Updated 31 AUGUST 1999 (SM)
Stopovers 1)THREE FREE STOPOVERS ARE PERMITTED IN EACH OF
THE MAXIMUM F O U R CONTINENTS VISITED
OTHER THAN THAT OF COMMENCEMENT OF TRAVEL.
2)ONE FREE STOPOVER IS PERMITTED AT INTERCONT'L
DEPARTURE AND ARRIVAL GATEWAY IN THE CONTINENT
OF COMMENCEMENT OF TRAVEL.
3)
UNLIMITED ADDITIONAL FLIGHT SEGMENTS(EXCEPT IN
CONTINENT OF COMMENCEMENT) MAY BE PURCHASED TO
ALLOW ADDITIONAL STOPOVERS WITHIN A CONTINENT
AT AUD160/ECONOMY CLASS P E R FLIGHT SEGMENT
Notes *
THIS IS THE QANTAS AIRWAYS"ONEWORLD F O U R
CONTINENTS" PUBLISHED FARE -
Routings A)RTW/CIRCLE TRIPS/OJ - VIA QF/BA/AA/AY/CX/CP/IB
/DI/IJ O P E R A T E D SERVICES ONLY.
B)TRANSFERS: UNLIMITED ONLINE/INTERLINE BETWEEN
QF/BA/AA/AY/CP/CX/DI/IB/IJ IS PERMITTED
SUBJECT TO A L L SECTOR/ROUTING RESTRICTIONS.
C)MAXIMUM F O U R CONTINENTS MAY BE VISITED
- WITH ONLY O N E INTERCONTINENTAL DEPARTURE
AND ARRIVAL PERMITTED FROM/IN EACH CONTINENT.
*NOTE: CIRCLE PACIFIC TRIP COMPRISING TWO
TRANSPACIFIC FLTS ARE N O T PERMITTED.
D)FREE SECTORS ARE LIMITED WITHIN EACH CONTINENT
AS FOLLOWS AND ARE SUBJECT TO THE MAXIMUM
STOPOVER ALLOWANCES. WHEN THE STOPOVER MAXIMUM
HAS BEEN REACHED ANY REMAINING USED FLIGHT
SEGMENTS SHALL BE FORFEITED -
1)4 SECTORS: EUROPE AND MIDDLE EAST WITH N O
MORE THAN 2 OF WHICH MAY BE TO/FROM MID.EAST
2)4 SECTORS: AFRICA/STH.WEST PACIFIC/STH.AMER.
3)6 SECTORS: NORTH AMERICA.
4)5 SECTORS: ASIA.
E)UNLIMITED ADDITIONAL FLIGHT SEGMENTS MAY BE
PURCHASED AT AUD160 EACH
Suggested Route 4 CONTINENTS: SYD/JNB/LON/YYZ/CHI/LAX/SYD
Fare Basis ECONOMY: M*ONEW4 (* = ADD SEASONALITY)
Rules copied from
www.travel.com.au website