ams511
Contributor
They introduced 11 and 17 afterwards an attempt to corner the whole market?
I don't understand your post. The MK-19 was a MK-17 with a turret. I believe the MK-19 was released around the same time as the 11 and 17, but it was not available in North America. I am not sure if they were sold in Asia.
Scubapro also made a MK-18 that predates the MK-11 and 17, but from what I remember that first stage was not sealed. It was a MK-16 with a turret. The MK-16 with the update is not a bad first stage, not sure why it doesn't get more respect.