HS code · 4-digit heading
HS Code 91.08 – Watch movements; complete and assembled
What HS 91.08 covers
HS Heading 9108 specifically covers "Watch movements; complete and assembled." This classification is crucial for the horological industry, as it defines the internal mechanism of a watch, ready to be fitted into a watch case. A watch movement is the heart of any watch, responsible for keeping time and powering any additional functions (complications) like chronographs, date displays, or moon phases. The 'complete and assembled' criterion means that the movement is fully put together and functional, even if it lacks a dial, hands, or case. This heading encompasses both mechanical movements (manual-winding, automatic-winding) and quartz movements (battery-powered, often highly accurate and mass-produced). The scope of 9108 is narrow but vital, focusing exclusively on these intricate mechanisms as distinct components in international trade. It excludes incomplete or unassembled movements (9109) and individual parts of movements (9110), as well as complete watches (9101 or 9102). For importers and exporters, precise classification under 9108 is critical for determining correct duties, complying with origin rules, and navigating trade agreements, particularly given the high value and specialized nature of many watch movements. This heading is a cornerstone of Chapter 91, dedicated to horological instruments, highlighting the specialized manufacturing and global supply chains involved in watchmaking, firmly placing these precision components within Section XVIII, which encompasses precision instruments and apparatus.
- Covers
- Mechanical watch movements (manual winding)
- Automatic watch movements (self-winding)
- Quartz watch movements (battery-powered)
- Chronograph movements (complete)
- Tourbillon movements (assembled)
- Multi-function quartz movements
- Skeleton watch movements (complete)
- Ultra-thin mechanical movements
- High-beat movements
- Sweep second movements
- Vibrating balance wheel movements
- Tuning fork movements
- Solar-powered watch movements (complete)
- Perpetual calendar movements
- Moon phase movements (assembled)
- GMT movements
- Alarm watch movements
- Minute repeater movements
- Smart watch movements (if identifiable as distinct horological movement)
- Retro-grade movements
- Jumping hour movements
- Digital quartz movements
- Analog quartz movements.
- Examples
A prestigious French luxury watch brand imports a significant volume of high-precision mechanical watch movements, including intricate tourbillon and perpetual calendar complications, from specialized manufacturers in Switzerland. These movements are then cased, dialled, and finished in France for global distribution as high-end timepieces. Concurrently, a US-based consumer electronics company imports thousands of complete, assembled quartz watch movements from a leading Japanese supplier for integration into its affordable smartwatch lines, leveraging existing trade agreements between the two nations to reduce import costs. Separately, a large Chinese watch manufacturer exports vast quantities of complete, assembled quartz movements to watch assembly plants across Southeast Asia and India, catering to the mass-market production of fashion watches.
Subheadings under 91.08 5
Codes often confused with 91.08
Common mistake. Common misclassification errors for HS 9108 often occur when the 'complete and assembled' criterion is misunderstood. Traders might incorrectly classify incomplete or unassembled watch movements under this heading; these should instead fall under 9109. Similarly, individual parts of watch movements, such as mainsprings or balance wheels, are often mistakenly placed here instead of their correct classification under 9110. Another frequent mistake is classifying a watch movement that is already fitted into a case or accompanied by a dial and hands as a movement, when it should be classified as a complete watch under 9101 (for precious metal cases) or 9102 (for other cases). The key is to ensure the movement is fully functional and assembled but not yet integrated into a complete watch.
Top exporters and importers of HS code 9108, 2025
In 2025, the largest exporter of HS code 9108 in UN Comtrade data was Japan, with 33% of world exports; the largest importer in UN Comtrade data was Hong Kong, with 33% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 Japan $298M 33% of world exports
- 2 Hong Kong $201M 23% of world exports
- 3 Switzerland $184M 21% of world exports
World total: $890M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Hong Kong $267M 33% of world imports
- 2 China $206M 26% of world imports
- 3 France $37M 4.5% of world imports
World total: $807M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Questions about HS 91.08
What is HS code 9108?
HS code 9108 is a 4-digit heading in the Harmonized System that covers: Watch movements; complete and assembled. HS Heading 9108 specifically covers "Watch movements; complete and assembled." This classification is crucial for the horological industry, as it defines the internal mechanism of a watch, ready to be fitted into a watch case. A watch movement is the heart of any watch, responsible for keeping time and powering any additional functions (complications) like chronographs, date displays, or moon phases. The 'complete and assembled' criterion means that the movement is fully put together and functional, even if it lacks a dial, hands, or case. This heading encompasses both mechanical movements (manual-winding, automatic-winding) and quartz movements (battery-powered, often highly accurate and mass-produced). The scope of 9108 is narrow but vital, focusing exclusively on these intricate mechanisms as distinct components in international trade. It excludes incomplete or unassembled movements (9109) and individual parts of movements (9110), as well as complete watches (9101 or 9102). For importers and exporters, precise classification under 9108 is critical for determining correct duties, complying with origin rules, and navigating trade agreements, particularly given the high value and specialized nature of many watch movements. This heading is a cornerstone of Chapter 91, dedicated to horological instruments, highlighting the specialized manufacturing and global supply chains involved in watchmaking, firmly placing these precision components within Section XVIII, which encompasses precision instruments and apparatus.
What products fall under HS code 9108?
Mechanical watch movements (manual winding), automatic watch movements (self-winding), quartz watch movements (battery-powered), chronograph movements (complete), tourbillon movements (assembled), multi-function quartz movements, skeleton watch movements (complete), ultra-thin mechanical movements, high-beat movements, sweep second movements, vibrating balance wheel movements, tuning fork movements, solar-powered watch movements (complete), perpetual calendar movements, moon phase movements (assembled), GMT movements, alarm watch movements, minute repeater movements, smart watch movements (if identifiable as distinct horological movement), retro-grade movements, jumping hour movements, digital quartz movements, analog quartz movements.
What are common misclassifications for HS code 9108?
Common misclassification errors for HS 9108 often occur when the 'complete and assembled' criterion is misunderstood. Traders might incorrectly classify incomplete or unassembled watch movements under this heading; these should instead fall under 9109. Similarly, individual parts of watch movements, such as mainsprings or balance wheels, are often mistakenly placed here instead of their correct classification under 9110. Another frequent mistake is classifying a watch movement that is already fitted into a case or accompanied by a dial and hands as a movement, when it should be classified as a complete watch under 9101 (for precious metal cases) or 9102 (for other cases). The key is to ensure the movement is fully functional and assembled but not yet integrated into a complete watch.
Which countries are the top exporters of goods under HS code 9108?
In 2025, the top exporters of HS code 9108 in UN Comtrade data were Japan ($298M, 33% of world exports), Hong Kong ($201M) and Switzerland ($184M). World exports came to about $890M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 9108?
In 2025, the top importers of HS code 9108 in UN Comtrade data were Hong Kong ($267M, 33% of world imports), China ($206M) and France ($37M). World imports came to about $807M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 9108 structured?
HS code 9108 is a 4-digit heading under Chapter 91 of the Harmonized System. The first 2 digits (91) identify the chapter, and digits 3-4 (08) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.