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Comparison Casio PRG-300-1A2 vs Casio Pro-Trek PRG-240-1

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Casio PRG-300-1A2
Casio Pro-Trek PRG-240-1
Casio PRG-300-1A2Casio Pro-Trek PRG-240-1
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Main
Alarm. Calendar. Timer. World time. Abundance of sensors. Compass included. Barometer. Altimeter and thermometer. Frost resistance down to -10 °C. Rotating bezel. Solar battery with power reserve indicator.
Gendermen'smen's
Country of originJapanJapan
Mechanism
Movement typequartzquartz
Calibermodule 3246
Accuracy+/- 15 s/month+/- 15 s/month
Power sourcesolar batterysolar battery
Power reserve indicatior
Dial
Dial typedigitaldigital
Backlightelectronicelectronic
Features
alarm
stopwatch
timer
day of the week
date
month
world time
compass
altimeter
thermometer
barometer
alarm
stopwatch
timer
day of the week
date
month
world time
compass
altimeter
thermometer
barometer
Case and strap
Case shaperoundround
Case materialplasticplastic
Colourblack with blueblack
Glass materialmineralmineral
Rotating bezel
Straprubber straprubber strap
Strap colourblackblack
Claspclassic (with buckle)classic (with buckle)
General specs
Waterproof100 WR / 10 ATM100 WR / 10 ATM
Frostproof
Diameter (width)47 mm51 mm
Thickness13 mm15.3 mm
Weight57 g65 g
Added to E-Catalogoctober 2015march 2014

Caliber

A caliber can be described as the type of movement used in a watch. It is expensive and impractical to design a unique movement for each watch model, so most manufacturers often use the same movement in different watch models, sometimes with significantly different designs. The term "caliber" is due to the fact that initially the type of movement was designated by a number (in inch lines) corresponding to its largest size; however, today unique names or alphanumeric indices that are not directly related to sizes are widely used.

Knowing the name of the caliber on which the watch you are interested in is built, you can, if desired, find more detailed information about the mechanism and determine how its characteristics meet your requirements.

Colour

The main colour of the watch case.

Modern watches are quite diverse in colour options. The most widespread models are in shades of " stainless steel ", golden and black ; however, in addition to this, on the market you can find, in particular, white, yellow, green, brown, red, orange, pink, silver, grey, blue and purple cases.

In general, the colour of the case is a fairly obvious parameter; Let's note only some of the nuances associated with marking:

— Multi-coloured models include models in which there is no clearly defined primary colour. If there is such a colour, it is indicated in the characteristics. And for two-tone cases, an additional colour can be specified, for example, "stainless steel with gold " or "black with blue "

— Silver, among other things, are plastic cases without additional coloring.

— "Stainless steel" in this case is a colour, not a material; other metals (e.g. alumin...ium and titanium) that are not complemented by PVD coating (see “Case Coating”) may have this shade. And the cases of gold watches, in turn, are not necessarily made of gold — red and white gold are also used in jewelry.

— Camouflage coloring is indicated separately — such watches are designated as "military", and here, again, the main shade of the coloring is given. However, not every military model has camouflage on the body; see below for details.

Frostproof

Watches with increased resistance to low air temperatures.

Such conditions are not favorable for either mechanical or quartz watches: in "mechanics" cold changes the properties of individual parts and leads to desynchronization of the mechanism, and in quartz watches it can also accelerate battery discharge. To avoid these annoyances, modern watches may include various design features that reduce the likelihood of failures in cold weather. This is, at a minimum, improved thermal insulation of the case; and in models with hands (including quartz), special materials with a minimum coefficient of thermal expansion can also be used for individual parts of the movement.

Separately, it is worth recalling that watches are usually worn close to the body (hand), and in cold weather they are most often also covered with a sleeve of clothing — as a result, the temperature at the location of the watch is noticeably higher than that of the surrounding air. And additional thermal protection significantly affects the cost. Thus, it makes sense to specifically look for frost-resistant watches if they are planned to be used in a "harsh" environment — with frequent frosts of -30 °C and above, during mountaineering ascents, long (from several days) winter hikes, etc. n. And for everyday use in a relatively mild climate, ordinary, non-frost-resistant models are quite suitable.

Diameter (width)

The nominal size of a watch case in diameter (for round cases) or width (for other options, see "Case Shape"). In the most miniature modern models, this size is 21 – 25 mm or even less, among the largest there are cases of 46 – 50 mm and even larger.

Larger watches are more convenient in the sense that the dial readings are better visible on them, and it is easier to provide various additional functions in the design. On the other hand, small watches look neater and create less discomfort directly when worn. In addition, female models (see "Gender") are traditionally made more miniature than male ones. So the choice for this indicator depends mainly on the intended specifics of the application: for example, large cases are best suited for outdoor activities and tourism, about 41 – 45 mm in size, for household wear (regardless of gender) — about 31 – 35 mm, and as an accessory to an evening dress, a small watch of 30 mm or less would be more appropriate.

Also note that the size of a compatible strap/bracelet is associated with this indicator — see "Strap Width" for details.

Thickness

The thickness of the watch case. A fairly obvious parameter; we only note that nowadays it is customary to attribute watches with a thickness of less than 7 mm to ultra-thin models. This design has both aesthetic and quite practical meaning — a thin watch will be useful for those who wear narrow sleeves with tight-fitting cuffs.

Weight

Total weight of the watch. As a rule, it is indicated taking into account the complete strap/bracelet.

The lightest modern watch weighs no more than 50 g. The most popular models weigh 50 - 100 g, and weight more than 150 g most often means not only a large, but also a fairly advanced device, usually for sports and tourism purposes.

Both light and heavy weight have their advantages: light watches create minimal inconvenience when worn, while massive watches are subconsciously perceived as a solid and reliable device.
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