I have a Heimdallr and im still scratching my head at the value. Looks like these are from the same factory as mentioned.
I keep thinking to myself they must leak water or have really shoddy idea of what qualifies as ceramic bezel inserts and sappire crystal.
Im planning on getting one of the Tuna models if they ever send me the $15 voucher they promised me for joining the newsletter. Still waiting a week later.