How Many Versions Of The Atmosphere Mask

[guyharrisonphoto]

I was looking at the Atmosphere FFM. I see that they have a "Mk3" model. Does this just refer to the Mk3 first stage? Has the mask itself evolved over the years, or does it use the same jetstream servo second stage?

Thanks

 

[JSOahu]

Yes, it does just refer to the Mk3 first stage and it uses the jetstream servo second stage.