skos:altLabel | - Harrison
- H4
- Longitude
- maritime navigation
- ''H-4''
- H-1 chronometer
- H4 and H5
- H4 chronometer
- Harrison style
- Harrison's Dream
- Harrison's Temperamant
- Harrison, John
- John Harrison H4
- John Harrison#Longitude watches
- John Harrison's
- John \"Longitude\" Harrison
- Sea Watch chronometer
- chronometer ''H4''
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