Quality
The room, the tests, and what goes inside.
GoTop states that zero defect is its production principle. What follows is not that claim, it is the machinery behind it, quoted from their own pages.
100,000 grade, and why not 1000
At the heart of the facility is our 100,000-grade dust-free assembly workshop. Featuring medical grade cleanliness, this is where watch assembly takes place under the supervision of our highly skilled team.
GoTop then explains the grade by comparison, which is the part worth reading:
Compared to a 1000 grade environment, the 100,000 needs much greater levels of environmental controls, including carefully monitored humidity levels, with a clean sheet enclosure that included entry and exit point sealing and purification along with decontamination shower facilities for both personal and goods entering and exiting the environment. In addition, to maintain the stringent 100,000 grade, our facility features specialized flooring and wall coverings in addition to the extensive filtration of the air supply.
On the floor generally: the temperature and humidity in every watch workshop and warehouse is controlled and the air is filtered. Access is by finger print scan, with CCTV.

The function tests, as GoTop lists them
GoTop publishes two lists on two pages. They do not match, so both are shown rather than merged into one longer list.
On the OEM and ODM page
- UV test
- Twisting force test
- Abrasion test
- Push button test
- Swing test
- Burn test
Introduced as "function quality tests such as", and ending in "etc", so it is not a closed list.
On the Why Choose Us page
- UV test
- Abrasion test
- Pull force test
- Swing test
Pull force test appears here and only here. Twisting force, push button and burn appear only on the other page.
Beyond the batch tests, GoTop states each watch is checked for accuracy, reliability and water resistance before dispatch, and that every part, half-finished watch and complete watch passes appearance inspection by IQC, QC and FQC. A document called the GoTop Watch Function Test Standard is published as a download.
What goes inside
GoTop publishes downloadable operation manuals for these calibres. It is the clearest statement on their site of what they actually fit.
| Calibre | Family |
|---|---|
| JS05 | JS |
| JS15 | JS |
| JS25 | JS |
| 0S10 | Miyota chronograph |
| 0S11 | Miyota chronograph |
| 0S20 | Miyota chronograph |
| 6P20 | Miyota multifunction |
| 6P29 | Miyota multifunction |
| VD5 | Chronograph |
| VD35 | Seiko chronograph quartz |
| VD36 | Seiko chronograph quartz |
| VD78 | Seiko quartz |
A Miyota multifunction movement is also listed without a calibre number, so it is not given one here.
Two more films
GoTop’s strap films, which do not sit on a station of the line.
How to make a stainless steel watch strap
How to adjust a mesh watch strap
Materials policy, quoted
We’ve adopt a lead-free material, minimizing the use of plastic, using sustainable material like recycled stainless steel, vegan straps, nylon material and other sustainable packaging material.
GoTop also states that all watches delivered to Europe are RoHS and REACH compliant, and publishes a BSCI report as a download. The report itself is not published on the page, so nothing is said here about what is in it.
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