The older I get the more I prefer a smaller watch collection. Less is definitely more. I currently own three Tunas, and I'm finding it's just too much for my mind to process. The Tuna is one of my favorite watches of all time, but it's not a perfect watch. It wears small owing to its lack of lugs. Its absence of lugs is such that the case doesn't cradle the wrist. The Tuna is very expensive for a quartz watch with no sapphire. The Hardlex crystal is Seiko's way. As I took photos of the 017, I found I HAD to take photos of the 033 and 031 as well. I get the impression that most Tuna fans prefer the sandblasted case of the 017 to the polished case of the 033, but I prefer the polished case. It gives the Tuna more pop on the wrist.
The 031 photos show it on the stock bracelet, which looks good but the thin plates dig into my wrist, so I changed it to a Super Engineer and now wears a lot more comfortably. My wife and I prefer the Tuna 031 to my Orient Saturation Diver, but the OSD is sapphire with an automatic movement, so I'm leaning toward keeping it. My ambivalence about keeping the OSD stems from fact that both are divers with black bezel, giving them similar, overlapping styling cues.
I will miss the 017, but having the 033 and 031 will be ample consolation. My current collection is now thus:
One. Seiko Tuna 033
Two. Seiko Tuna 031
Three. Seiko Sumo
Four. Seiko SUN023 Kinetic Diver (arrives tomorrow, a birthday present)