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Eco Drive Accuracy Report...

15907 Views 16 Replies 7 Participants Last post by  Fastest
...mostly anyway. After gaining a fair few Citizen Eco Drives during the past year or so, i set them all to atomic time at the beginning of the year and have kept tabs on how they've performed purely for my own amusement.

I thought id share the results with the members here and invite others to let us know how their eco drives have been performing. Maybe we can get a fair idea how these movements perform if we get a large enough database. Obviously all radio controlled models should be excluded from this, (even though two of mine are rc, as im in oz, none receive any signals and thus only operate as standard quartz).

my rate results (all watches except where noted set on 28/1/10):

Citizen AS8009-53E = +4sec/month

Citizen Calibre 2100 = -2sec/month

Citizen Nighthawk = +4sec/month

Citizen World Time = +6sec/month

Citizen BJ2120-07E = +8sec/month

Citizen BN0065-55E = +8sec/month

Citizen JP3040-59E = +3sec/month (digital display)
(battery powered) = -5sec/month (analogue display)

Citizen PMD56-2972 = +/- 0sec/month (measured 2wks only)

Citizen JR3090-58M = +4sec/month

Citizen BL5280-52W = +9sec/month

and as a reference from two others i measured:

Casio EF-524SP-1A = +10sec/month (measured 2 wks only)

Tissot T-Touch = +2sec/month

I hope this was of interest to someone
...surprised?, as expected?, let us know what you guys are getting.
This is my first post here, i see many regulars from other joints ^-^ , pleased to be here, thanks for the invite John, cheers.
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Your evaluations are very interesting. I however wonder how you manage to measure the decimal fraction of a second, what kind of calibration apparatus are you utilizing?
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