Metal-band models are exceptionally popular among affordable Casio watches.
Among them, the choice that particularly troubles buyers is between the 2 enduring classics, A158 and A164.
At a glance, these 2 watches look almost like twins. Side by side, however, their design directions and wearing comfort differ clearly.
Having reviewed many G-SHOCKs and affordable Casios, I explain the A158/A164 differences in detail.
I also take a closer look at the currently hugely popular Aimyon-worn A158WEA-9.
The Verdict: Should You Buy A158 or A164?
Here are the selection criteria upfront.
- ✅A158 Is Recommended If:
You like ultimate simplicity and a retro-classic atmosphere.
You want the same family worn by celebrities such as Aimyon, or a very thin, light watch.
- ✅A164 Is Recommended If:
You like a slightly sporty, mechanical design.
You want a little of G-SHOCK's ruggedness in an affordable Casio.
The functions and internal module are exactly the same, so personal preference in appearance is a dependable way to choose.
If Unsure, Choose the Classic A158
Search on Amazon.comSearch on eBay
For a Slightly More Rugged Design, Choose A164
Search on Amazon.comSearch on eBay
A158 vs. A164: Specifications Compared
First, check the basic specifications in this table.
| Item | A158, such as A158WA-1 | A164, such as A164WA-1 |
| Concept | Retro, simple, classic | Sporty and mechanical |
| Case size, H × W × D | 36.8 × 33.2 × 8.2 mm | 36.8 × 35.0 × 8.3 mm |
| Weight | Approximately 46g | Approximately 51g |
| Face design | Clean border lines with less lettering | Lettering such as ILLUMINATOR and G-SHOCK-like panel divisions |
| Lugs, where the band connects | Slim and clean | Slightly thicker and sturdier |
| Functions and module | Stopwatch, alarm, hourly signal, and Auto Calendar, shared | Stopwatch, alarm, hourly signal, and Auto Calendar, shared |
| Backlight | Microlight Illumination from the left, shared | Microlight Illumination from the left, shared |
Compare with A159 and A168 Too
Detailed Comparison: 3 Decisive Differences
1. Design and Dial Appearance
The biggest difference is the design around the dial.
A158 has a very simple border around the LCD, with a thoroughly retro face reminiscent of digital watches in the 1980s. Without an assertive appearance, it works naturally with smart outfits or women's slim wrists.
Where to Buy the Casio A158WA-1
Affiliate links — we may earn a commission.
The gold A158 is popularly known as the Aimyon model.
Where to Buy the Casio A158WEA-9
Affiliate links — we may earn a commission.
Meanwhile, A164 has prominent text above the dial, such as ILLUMINATOR depending on the model and WATER RESIST, with somewhat more complex panel divisions around the LCD.
It has mechanical appeal recalling the original G-SHOCK DW-5000C, a style that speaks to many men.
Where to Buy the Casio A164WA-1Q
Affiliate links — we may earn a commission.
2. Size, Weight, and Lug Shape
The specification table shows that A164 is approximately 1.8mm wider and 5g heavier.
The difference comes from the thickness of the lugs connecting the watch and band.
The A158 lugs taper cleanly, while A164 has thicker lugs and a slightly more substantial, sturdy-looking shape.
That gives A164 slightly more presence as a wristwatch when worn.
3. The Functions Are Exactly the Same
You might think different appearances mean different functions, but the internal module, number 593, is shared.
- Water resistance for everyday use
- Stopwatch, 1/100 second
- Daily alarm and hourly signal
- An LED microlight for darkness
All these capabilities are the same, so there is no need to debate functions.
Special Highlight: What Is the Hugely Popular Aimyon Model?
Here is a special color within the A158 series that is currently extremely popular. It is the A158WEA-9.
Singer-songwriter Aimyon's appearances wearing it privately and in the media made it a talking point, with people continually searching for Aimyon Casio and A158 Aimyon.
While the standard A158WA-1 has a largely black dial, the A158WEA-9 has pale gold, beige-like coloring around the dial.
This carefully balanced color blends old-fashioned retro appeal with a modern emotional feel, making its accessory-like wearability the greatest attraction.
🚨Point to Consider:
The A158WEA-9's popularity means online stores such as Amazon and Rakuten may sell out or show rising prices depending on timing.
Prices and stock fluctuate on Amazon and Rakuten because it is popular. Compare current prices before choosing.
Where to Buy the Casio A158WEA-9
Affiliate links — we may earn a commission.
Conclusion: A158 Is the Classic Choice; A164 Adds Personality
Here are the A158/A164 differences one more time.
- A158: the classic for strong retro appeal, lightness, or celebrity-worn versions such as A158WEA-9.
- A164: for those wanting slightly mechanical, sporty styling and masculine ruggedness in an affordable Casio.
- A158WEA: for a celebrity-worn model.
Either offers durability and accuracy hard to believe at a price of only a few thousand yen.
"If unsure, buy both"
is a generous purchase that is another attraction of affordable Casio watches.
Where to Buy the Casio A158WA-1
Affiliate links — we may earn a commission.
Where to Buy the Casio A164WA-1Q
Affiliate links — we may earn a commission.
Where to Buy the Casio A158WEA-9
Affiliate links — we may earn a commission.
Still Undecided? See This Article 👇
