What Luciano meant is that body temperature variations will never be as great as ambient.
I dunno. I've left my watch in my truck for several days during winter, and it still kept perfect time. And it gets really cold here in winter...;o}
Same thing here... I've got a cheap watch that's wrapped around my rear view mirror year-round. Except for resetting it twice a year for daylight savings time, it holds time well, and we get wild temp variations up here. (and yes, the watch probably costs more than the car, at least you'd think so if you saw the car)
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