Product classification
HS code for Mechanical clock movements: 9109.90
Clock movements, complete and assembled, other than electrically operated.
Classification of mechanical clock movements under HS 9109.90
HS code 9109.90 is designated for complete and assembled clock movements that are not electrically operated. According to the Explanatory Notes to the Harmonized System, a movement is considered complete and assembled when it is ready to function, requiring only the addition of a dial, hands, and a case to become a finished clock. Heading 9109 is distinct from heading 9108, which covers watch movements. The distinction between a clock movement and a watch movement generally depends on the physical dimensions or the intended use in a portable timepiece. Subheading 9109.90 specifically captures mechanical movements, such as those powered by weights or springs. These movements utilize a mechanical escapement mechanism to regulate the release of energy. The classification excludes movements that are driven by an electric motor, a solenoid, or a quartz crystal powered by a battery, as those are classified under 9109.10. For a movement to be classified here, it must be fully assembled; individual parts or sets of parts are classified elsewhere in Chapter 91.
- Covers
- Spring-driven mechanical clock movements
- Weight-driven grandfather clock movements
- Pendulum clock movements (non-electric)
- Mechanical movements for mantel clocks
- Assembled mechanical movements for cuckoo clocks
- Also under 9109.90
- Hermle Mechanical Clock Movements
- Kieninger Mechanical Clock Movements
- Urgos Mechanical Clock Movements
- Regula Cuckoo Clock Movements
- Comitti of London Mechanical Movements
Codes often confused with 9109.90
Common mistake. Mechanical clock movements are often misclassified under 9109.10, which is the code for electrically operated movements. This error usually happens when the movement has a mechanical appearance but includes a small battery-powered assist. Another common misclassification is 9108.90, which covers mechanical watch movements. Importers must check Chapter 91 Note 3 to ensure the movement exceeds 12mm in thickness or 50mm in width to qualify as a clock movement. Finally, unassembled sets of parts are often wrongly placed here instead of 9110.90.
Top exporters and importers of HS 910990 (the code used for mechanical clock movements), 2025
In 2025, the largest exporter of HS 910990 (the code used for mechanical clock movements) in UN Comtrade data was Germany, with 36% of world exports; the largest importer in UN Comtrade data was the United States, with 31% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 910990, not only mechanical clock movements.
Top exporters 2025 · share of world exports
- 1 Germany $3.6M 36% of world exports
- 2 Switzerland $1.8M 18% of world exports
- 3 Italy $1.6M 16% of world exports
World total: $10M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $3.7M 31% of world imports
- 2 India $2.2M 19% of world imports
- 3 Germany $711K 6.0% of world imports
World total: $12M 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.
Brazil NCM code for mechanical clock movements
Brazil classifies mechanical clock movements under NCM 9109.90.00: HS 9109.90 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about mechanical clock movements
What is the HS code for Mechanical clock movements?
The HS code for Mechanical clock movements is 910990 (Clock movements; complete and assembled, other than electrically operated). The HS code for complete and assembled mechanical clock movements (not electrically operated) is 9109.90.
How do I classify Mechanical clock movements for customs?
Mechanical clock movements is classified under HS code 910990 — Clock movements; complete and assembled, other than electrically operated. This is a 6-digit subheading level code.
Does 9109.90 include clock parts?
No, 9109.90 is only for complete and assembled movements. Individual parts like gears or springs are classified under 9114.
Which countries are the top exporters of mechanical clock movements (HS 910990)?
In 2025, the top exporters of HS 910990 (the code used for mechanical clock movements) in UN Comtrade data were Germany ($3.6M, 36% of world exports), Switzerland ($1.8M) and Italy ($1.6M). World exports came to about $10M, 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 mechanical clock movements (HS 910990)?
In 2025, the top importers of HS 910990 (the code used for mechanical clock movements) in UN Comtrade data were the United States ($3.7M, 31% of world imports), India ($2.2M) and Germany ($711K). World imports came to about $12M, 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.
Is the HS code for Mechanical clock movements the same in all countries?
The base HS code 910990 for Mechanical clock movements is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for mechanical clock movements in Brazil?
In Brazil, mechanical clock movements (HS 910990) is classified under NCM 9109.90.00.