Joined
·
82 Posts
There are two types of GMT Watches. Type A is where a module is added to the movement and in that case the GMT hand is set independently so when you travel you quick set that hand. The other type is a true GMT Watch where the feature is integrated with the mvmt so when you travel you set the GMT hand to GMT (where it always stays) and you quickset the hour hand as you cross timezones.(of course you can set the GMT hand to hometime or some other reference but changing the GMT hand in that type of watch is a pain since you have to stop the watch to do it) With a true GMT the watch doesn't stop as you reset the hour hand.Why do they call these "GMT watches"? Yes there's a 24 hr hand, but it doesn't show GMT, Zulu or Coordinated Universal Time.
Thanks for explaining that Nelson. I didn't know the extra hour hand could actually be set differently. I have a Seiko World Time (1968) where that extra hand just shows the 24 hour time geared to the 12 hour movement.There are two types of GMT Watches. Type A is where a module is added to the movement and in that case the GMT hand is set independently so when you travel you quick set that hand. The other type is a true GMT Watch where the feature is integrated with the mvmt so when you travel you set the GMT hand to GMT (where it always stays) and you quickset the hour hand as you cross timezones.(of course you can set the GMT hand to hometime or some other reference but changing the GMT hand in that type of watch is a pain since you have to stop the watch to do it) With a true GMT the watch doesn't stop as you reset the hour hand.