Flynn witnessesd some of the biggest milestones in McCaw's career in recent years, including his 100th test and the All Blacks' Rugby World Cup final win against the Wallabies - McCaw's final match of professional rugby.
On Friday night he made an emotional address at the New Zealand Rugby Awards at Auckland's Viaduct Events Centre, and took possession of a framed front-page of the Herald on Sunday's historic 8am World Cup edition.
The souvenir image, showing McCaw surrounded by ecstatic team-mates celebrating their back-to-back triumph at Twickenham, was presented by the paper's editor, Miriyana Alexander.
Although his playing days are over, he stressed he wouldn't be totally lost to the national game.
"I will want to give something back at some point, but what that actually means I don't know yet."
He has already entered April's GODZone 550km adventure race in the Tasman District to raise money for the Cure Kids charity.