We just received another piece for our Vintage Scubapro Regulator collection which will be on exhibit later this year.SCUBAPRO MK-V 1st and R-109 2nd stage Our unit is in very good conditions. it has the original hose, Mouthpiece, Yoke protector and even came with the original manual. The balanced, flow-through piston first stage has only 1 HP Port and 2 LP Ports.
The Yoke is designed for only 2250psi service pressure and is much thinner compared to the heavier 3000psi Yokes in use today. The second stage is unbalanced and has a full-metal housing with rubber purge.
The breathing resistance is adjustable.