Here 2 Coleman solus discus stoves .. 1 silent & 1 roarer .. Both having the same fill/pressure release, both having the lockable NRV type pump . Noting the extreme 'waisting' of the riser & the very prominent ridge on the stove base . The pan ring is marked Coleman Canada The roarer is also marked Coleman
I just came across this post. There is a reserve cap on top of that air screw. You don't see too many of these. Thanks for adding this neat stove