Does '65 Factory Power Brake Booster Use a Check Valve Anywhere?

[dibbons]

Maybe the little separate vacuum tank (painted black on driver's inner fender in photo) takes the place of the need for a check valve. Anyone know for sure? Thank you.

 

[65 Dartman]

@65dartcharger

 

[Professor Fate]

Inline check valve- 90* off the intake vacuum fitting. Pic stolen from old thread.