Δε λέει κάτι τέτοιο στο manual... Εκτός κι αν εχεις Inside information... 
Although quartz has a very low coefficient of thermal expansion,
temperature changes are the major cause of frequency variation in crystal oscillators. The most obvious way of reducing the effect of temperature on oscillation rate is to keep the crystal at a constant temperature.
The crystal planes and tuning of a consumer-grade clock crystal are designed for minimal temperature sensitivity in terms of their effect on frequency
and operate best at about 25 to 28 °C . At that temperature the crystal oscillates at its fastest.
A higher or lower temperature will result in a −0.035 ppm/°C2 (slower) oscillation rate. So a ±1 °C temperature deviation will account for a (±1)2 × −0.035 ppm = −0.035 ppm rate change, which is equivalent to −1.1 seconds per year. If, instead, the crystal experiences a ±10 °C temperature deviation, then the rate change will be (±10)2 × −0.035 ppm = −3.5 ppm, which is equivalent to −110 seconds per year.
For reference, here are some of the specs for the 7C46 quartz movement in my SBBN007 Seiko Tuna:
SPECIFICATIONS
1. Frequency of crystal oscillator ........... 32,768 Hz (Hz = Hertz … Cycles per second)
2. Loss/gain (monthly rate) ..................... Cal. 7C46, 7N36, 7N85: Less than 15 seconds at normal temperature range (5° C ~ 35° C), Cal. V736: Less than 20 seconds at normal temperature, range (5° C ~ 35° C)
3. Operational temperature range .......... Cal. 7C46, 7N36, 7N85: –10° C ~ +60° C, Cal. V736: –5° C ~ +50° C
Interestingly, the manual also includes this cautionary note:
Do not leave your watch in very low temperatures below –10° C (+14° F) for a long time since the cold may cause a slight time loss or gain. However, the above conditions will be corrected when the watch returns to normal temperature.
From those two notes, I conclude that the watch will indeed run below –10° C (+14° F), but will not keep time within specification.
Cooler temps slow down a quartz watch, while much warmer air may cause them to run faster. "Room temperature", ranging from 62F to 75F, is what most quartz watches are initially regulated for. Watch accuracy can drift over time as the quartz crystal of the movement ages. In my experience, most quartz watches have a tendency to gain over long periods of time.
TC is an abbreviation for "thermocompensated." This means that the movement has a temperature-detecting device (a thermometer, really, called by some a "thermistor") that signals to the movement the existing temperature. As the temperature changes, this signal causes an adjustment to take place in the linkage from the quartz crystal to the stepping motor that causes the motor to either (very, very slightly) speed up or slow down,
since this varying temperature will cause the quartz crystal to oscillate with greater or lesser frequency. The net result is that the movement will stay very close to exact time. Good thermocompensated watches will lose or gain less than 10 seconds a year.
