Today a bit different than always … First of all, the described watch is from a much lower budget than all the models we have reviewed earlier. Secondly, it’s a quartz watch, which we have reviewed on the blog only once or twice. Okay, three, but two of them were not my watches, but only models made available to us for review. There are very few quartz watches that have managed to stay with me for longer. The model that I will present today has been with me for a year and it doesn’t seem like I will part with it.

Some time ago I was looking for a watch that I would be able to wear in any situation, i.e. with a sweatshirt, shirt, for a trip to the forest, beach, swimming pool, sports, renovation works, and even, as a last resort, with a suit – maybe seem impossible, but the Casio EFR-S107D – will work in all these situations, which I have already managed to check. Casio EFR-S107D can be purchased in stores for about PLN 450. I managed to buy a slightly used copy for PLN 220 with delivery.

What can a used Casio offer for PLN 220? Feel free to read.


Well, it can’t offer a box … I mean, maybe a cube-shaped cardboard box with a place for a watch inside. Nothing special, but the cardboard box is still in the closet.


The Casio EFR-S107D belongs to the Edifice Slim Line and the name of this line is not accidental, the watch case is theoretically 42.5mm wide, but only theoretically, because this dimension includes the protrusion on its left side and the crown cover on the right. The bezel size is 40mm and this is how the watch looks in practice. The length of L2L is 47.5mm and the thickness is only 8.3mm. 8.3mm is basically an achievable result for a quartz watch, but this model has a WR of 100m, which means that you can swim and even snorkel with it – yes … I checked, I always swim with all my watches with 100m WR and more. On my 18 cm wrist it fits perfectly, it has practically the perfect size for me, and its thickness is probably its greatest asset and this element,for which I value this watch the most.

The watch is and looks really thin. This effect is intensified by the shape of the case itself, with the vertical wall of which is only 2mm; the remaining thickness of the watch is the bezel and the angled surfaces that have been polished to give the case a multidimensionality. The bezel is wide, almost all of its surface is flat and brushed on the top. On the left and right side of the bezel, 2 steel screws are screwed in. Somewhere I read that it only have a decorative function and the bezel itself is not attached to the case with those screws help. Screws don’t bother me, but I have noticed that opinions about them are divided. In general, the case has a lot of surfaces and it would be very difficult to describe it in words, the whole thing makes a bit of a futuristic impression and the design is very similar to the Casio Oceanus OCW-S100-1AJF case, except that in Oceanus the case was titanium and the cuts looked sensational live. The cut on the EFR-S107D is just fine, nothing more.

The lugs are quite short and not bent, but broken downwards. Like the whole case, they are also very thin.

The crown is not screwed, it’s fully polished and embossed with the Edifice line logo. The crown is small, but it’s easy to pull off and to set the time. From the top, the watch is covered with a flat sapphire glass and this is the hallmark of this model, it even has it written on the dial so that no one has any doubts. Yes, in this budget it’s practically unheard of except for typically Chinese watches. This is another big plus of this watch.


The watch is powered by a quartz movement with module number 5359. The battery lasts up to 3 years, there is no solar power, and the only additional function is the date display. Nothing special in general, except that it is probably a very thin quartz movement.


The dial is black and its texture resembles the so-called a scraper known from some Grand Seiko models or, for example, from Ball. However, in the case of Casio, the effect is not so intense and nice, so you can see that it’s a budget watch. The dial is generally very simple – on the quite outer part there is a low chapter ring with a minute scale, and a little closer, partially cutting into the chapter ring, longitudinal, steel hour indices with the center filled with white paint are applied. The 12 o’clock index is slightly larger and, like the indices at 3.6 and 9 o’clock, is aquamarine in color. It looks very interesting, I am always a supporter of indices in colors other than standard silver or gold. Blue indices have the oceanus mentioned earlier and combined with the quality of this watch, the effect is amazing. In the case of edifice, the effect is not that overwhelming, but in combination with the seconds hand and inscriptions on the dial, it gives the whole watch a sporty flair.

To the left of the 3 o’clock index there is a date window, which is nicely contoured, and the date stamp itself is made of delicate white numbers on a black background – it’s just perfect, bravo Casio, that’s how it should be done. Under the index 12 we have the logo of the Edifice line and a smaller one of the manufacturer itself, and under the axis of the hands, in aquamarine, there is the aforementioned information about sapphire glass and white inscriptions with information about the water resistance class of the watch. The hands are in the shape of swords, the minute and hour hands are filled with a luminescent mass inside, the standard hour hand is shorter than the minute hand. The second hand is aquamarine in color with a silver counterweight. Interestingly, the second hand hits all indices perfectly, which has probably never happened to me before, except for the Oceanus OCW-s100, which, however, owes it to a special module equipped with technology responsible for such operation.

The indices themselves are made correctly, there are no flaws, but the effect of overlapping indexes is not so visible. Perhaps because they are low or lack sharp edges and attention to detail. Fortunately, there is no kitsch effect and the feeling that everything is plastic or cast as one unit with the dial. Unfortunately, instead of the luma, they were filled only with white paint, which is incomprehensible to me, because they would look identical and the watch would have some additional functionality.

As we are with the luminescent mass, immediately give up all hope of reading the hours at night from this watch. Luma was applied only to the hands and what’s more, it shines so dimly and briefly that it might not be there at all, and the effect would be the same. Well, you can’t have it all.


What is the most important part of the watch with the very thin case? The answer is simple – a very thin strap / bracelet. It’s an element that can easily spoil the whole effect; luckily not in this case. The bracelet is only 2mm thick and looks like full links… but that’s the only way it looks. After removing the link, you can see that it’s a properly bent steel plate. All this translates into the weight of the bracelet – it is very light, but also comfortable to wear. The links are mostly brushed, the sides and a small part of the middle links have been polished, but here you can see the poor quality of the materials and cuts used, because the effect is not very noticeable. The endlinks are empty inside and do not fit perfectly to the case – you can see gaps here and there. The bracelet is definitely the part of this watch that the manufacturer saved a little on. However, I do not hold it against him, the most important thing for me is that it is appropriately thin and very comfortable to wear.

The clasp is a classic latch made of thin sheet metal, brushed on the outside. The elements that can only be seen after undoing have been polished. The clasp is short and appropriately thin – it too could spoil everything if it were otherwise. Importantly, it has a micro-regulation with 3 holes – I don’t need anything more to be happy.

Despite its budget solutions, the bracelet doesn’t look particularly cheesy. You can see that these are not the highest flights, but I already had a few Seiko costing several times the price of this Casio and the bracelet in them made a worse impression on me.


I would not buy this watch for PLN 450 or PLN 500, but in the amount of PLN 200-250, it’s in my opinion the best choice if we are looking for a typical EDC watch that will work in practically every situation. Despite its simplicity, it has a delicate sporting feel, which, combined with solid workmanship of materials resistant to the passage of time, guarantees that the watch will serve us for a very long time and will not get bored quickly.

The biggest advantage of this Casio, however, is the comfort of wearing, which is ensured by the dimensions and the appropriate design of the watch – this is what I have bet on completely into recently when choosing watches. All large, uncomfortable watches have found new owners to make room for a smaller one, and after wearing them for 8 hours, I still don’t feel the need to take it off to relieve my wrist.



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