Since we're at the Seiko movement topic, here's some highly regarded Seiko divers with the better movements and historical 1pc monocoque (front loading) case.
Here's a pic of my ex 300m Marine Master with the infamous 'Grand Seiko' hi-beat auto 28,800bph 8L35 movement. I'm getting +/-4 sec per day with it:
For quartz, Seikos are also untouchable too with their 7549/ 7C46 high torque 7 jewel movements +/-15sec per month. Here's 2 of my tunas, 600m(The one which Seiko secured to a submarine and went to the depth of 1000+ metres without problem mainly due to the 1pc monocoque case design) & 1000m Darth Tuna:
Here's a pic of my ex 300m Marine Master with the infamous 'Grand Seiko' hi-beat auto 28,800bph 8L35 movement. I'm getting +/-4 sec per day with it:
For quartz, Seikos are also untouchable too with their 7549/ 7C46 high torque 7 jewel movements +/-15sec per month. Here's 2 of my tunas, 600m(The one which Seiko secured to a submarine and went to the depth of 1000+ metres without problem mainly due to the 1pc monocoque case design) & 1000m Darth Tuna:
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