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Comparison Casio Edifice EQS-900DB-1A vs Casio Edifice EFS-S540DB-1A

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Casio Edifice EQS-900DB-1A
Casio Edifice EFS-S540DB-1A
Casio Edifice EQS-900DB-1ACasio Edifice EFS-S540DB-1A
Outdated ProductOutdated Product
TOP sellers
Gendermen'smen's
Country of originJapanJapan
Mechanism
Movement typequartzquartz
Calibermodule 5585module 5585
Second hand++
Accuracy+/- 20 s/month
Power sourcesolar batterysolar battery
Power reserve indicatior
Dial
Dial typeanaloganalog
Type of indexmarksmarks
Colour
black
black
Backlightluminousluminous
Features
date
time format 12/24 h
chronograph
date
time format 12/24 h
chronograph
Case and strap
Case shaperoundround
Case materialstainless steelstainless steel
Colourstainless steel with blackstainless steel with black
Glass materialmineralsapphire
Crown protection
Strapsteel braceletsteel bracelet
Strap colourstainless steelstainless steel
Claspclip (unfolding)clip (unfolding)
General specs
Waterproof100 WR / 10 ATM100 WR / 10 ATM
Diameter (width)48 mm48 mm
Thickness12 mm12 mm
Weight156 g87 g
Added to E-Catalogfebruary 2023october 2018

Accuracy

The accuracy of the rate is usually determined by the largest error — the deviation from the reference time, which can occur in a month when the watch is constantly running in normal mode. Accordingly, the smaller the number in this paragraph, the more accurate the clock. In addition, the accuracy of the movement is a kind of status indicator: if the error exceeds the values stated in the characteristics, this may indicate a malfunction in the mechanism.

If the accuracy indicators are the same both in advance and in lag, one number is indicated in the characteristics — for example, 30 sec / month (i.e. +/-30 sec / month); however, many mechanisms have unequal deviations, for example -15/+25 sec/month. Also note that this parameter is relevant only for quartz watches (see “Movement type”): in mechanical models, the accuracy of the rate is noticeably lower, it is measured in seconds not per month, but per day.

Glass material

The material of the transparent coating covering the dial.

Plastic. Transparent plastic (also known as "plexiglass", also known as "organic glass") is considered the simplest option and is found mainly in models of the initial and middle price range, mainly sports and tourist specialization. This material is lightweight, inexpensive, and also tolerates shocks and falls well: with a strong impact, it will crack rather than break, and plastic fragments are much safer than glass ones. These properties are indispensable for shockproof watches. On the other hand, plastic is very sensitive to scratches and tends to become cloudy quickly due to scratches; and in general it gets dirty more easily than glass.

Mineral. Mineral in this case means ordinary, widespread glass — like the one used in windows. It favorably differs from plastic in high hardness: to scratch such material, you need to make considerable efforts. As a result, mineral glass varieties do not become cloudy and remain transparent for almost the entire life of the watch. Among the shortcomings, brittleness can be noted: upon impact, the glass surface can shatter into fragments. On the other hand, even for ordinary glass, such a blow should be quite strong; in addition, manufacturers often use various design solutions (“dial” recessed into the case, tempered glass, etc.) in order to reduce the ri...sk of such an accident to an absolute minimum. Thanks to all this, mineral glass has become widespread today in all types and price categories of watches.

Sapphire. Glass made of artificially grown sapphire (transparent corundum — aluminium oxide). The main advantage of this material is the highest scratch resistance: such a surface can only be scratched with a diamond or a material similar in hardness to it. On the other hand, sapphire crystals are not cheap, but they do not withstand shocks well and are relatively unsuitable for "protected" watches. As a result, this material is found mainly in rather expensive models designed for everyday use (although there are exceptions).

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.
Casio Edifice EQS-900DB-1A often compared
Casio Edifice EFS-S540DB-1A often compared