Excellent info. Thanks for this.
So it sounds like we can debunk the theory that there was some sort of formal radius within an O6 city where other teams could not pluck a player away from.
If teams could scour the continent at free will, I guess the process was that you find a player, offer a C form, and then place them in any one of your affiliated franchises?
I'm guessing Montreal invested the most in recruitment and forming team affiliations.
From the Original Six wiki: "The league had a rule that gave each team exclusive rights to negotiate contracts with promising local players within 50 miles (80 km) of its home ice."
I would guess this rule had
some effect, but is not the main reason for the Leafs and Habs success. What the location did give was a financial advantage compared to their US-based counterparts, allowing them to invest into better player development and so on.
The 50 mile rule certainly gave them Maurice Richard, who really is the one that made the Canadiens legendary. However, if other teams had been smarter they could have traded for him at a very low price:
www.habseyesontheprize.com
So if Richard had been traded and doesn't inspire the people of Quebec like he did, maybe you don't get as many great players out of the province, and history changes. As can be read in the article, up until Richard's arrival the Canadiens had little to no benefit of the rule.
After that though, without a doubt, the Habs teams of the 50s and 60s benefited from the 50 mile rule. Henri Richard, Bernie Geoffrion, Jacques Lemaire, Serge Savard among others.
Though by the 70s this 50 mile rule was long gone. Guy Lafleur for example was not brought in by this rule, they got him by trading for the 1971 1st round pick of the Golden Seals. In 1972 they had acquired the 4th pick which they used to select Steve Shutt. Ken Dryden was acquired in a trade from the Bruins.
To summarize: yeah the 50 mile rule was a thing. The dynasty of the 70s was not built by it though. But again, every team had the chance to stop the Habs dynasty in its tracks before it even began!