I've got a Longines Spirit COSC and have kept it wound for the last month by wearing it every second or third day before it runs out of power. The accuracy for the last month is about 0.3 seconds per day. It's runs fractionally slow when worn or dial up and faster when dial down and a good bit slower 12up. If you mess around with the positioning when not wearing it you can balance the accuracy out.
Agree. I find it useless too. Would prefer it to be a 12 hour indicator for a chronograph or even a 10th of a second indicator found on some chronographs or just 2 dials. The 24 hour dial put me off the Bulova Parking Metre, wish they went with the original Bulova even though I no longer see mechanical parking metres.
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