Skip to main content
Become a member
Donate
Shop
Venue hire
Search
Royal Museums Greenwich
Main navigation
Menu
Royal Museums Greenwich
Search
Close
Plan your visit
Back
Plan your visit
Tickets and prices
Getting here
Accessibility
Family visits
Group visits
School visits
Cutty Sark
Cutty Sark
Open daily 10am-5pm
Last entry 4.15pm
Adult: £22 | Child: £11
Members go free
Free
National Maritime Museum
National Maritime Museum
Open daily 10am-5pm
Last entry 4.15pm
Free entry
Booking recommended
Free
Queen's House
Queen's House
Open daily 10am-5pm
Last entry 4.15pm
Free entry
Booking recommended
Royal Observatory
Royal Observatory
Open daily 10am-6pm
Last entry 5.15pm
Adult: £24 | Child: £12
Members go free
What's on
Back
What's on
Exhibitions
For families
Member events
Talks and tours
National Maritime Museum
Exhibitions
Astronomy Photographer of the Year exhibition
See the world's greatest space photography at the National Maritime Museum
National Maritime Museum
Events and festivals
International Talk Like a Pirate Day
Enjoy 2-for-1 entry to Pirates at the National Maritime Museum this weekend and come dressed as a pirate for the chance to win some amazing treasures!
National Maritime Museum
Events and festivals
Caribbean Takeover
Join the Caribbean Social Forum as they take over the National Maritime Museum and the Queen’s House for another spectacular year of celebration
Stories
Back
Stories
Maritime history
Space and astronomy
Art and culture
The ocean
Time
Royal history
ZWO Astronomy Photographer of the Year 2025 winners
The winning images in the world's biggest space photography competition have been revealed
Cutty Sark’s new binnacle: charting a course for heritage crafts
A navigational case shines a light on traditional skills – and prompts intriguing questions into the tea clipper’s history
HMS Captain: Britain's forgotten maritime disaster
The historian leading the search for HMS Captain questions why the sinking of 'one of the finest ships in the world' is not better known today.
Collections
Back
Collections
Conservation
Research
Donating items to our collection
Collections Online
Search our online database and explore our objects, paintings, archives and library collections from home
The Prince Philip Maritime Collections Centre
Come behind the scenes at our state-of-the-art conservation studio
Caird Library
Visit the world's largest maritime library and archive collection at the National Maritime Museum
Learn
Back
Learn
School trips and workshops
Self-guided school visits
Online resources and activities
Booking an on-site schools session
Booking a digital schools session
Young people and youth groups
Support us
Back
Support us
Become a member
Donate
Corporate partnerships
Become a patron
Leave a legacy
Commemoration and celebration
Our sites
Cutty Sark
National Maritime Museum
Queen's House
Royal Observatory
Become a member
Donate
Shop
Venue hire
Search
Beta
Back to All Results
Explore our Collection
Objects
Library
Archive
Search our collection
Filters…
Search
Item Category
Select…
Item Category
Item Category
Timekeeping
Timekeeping
Show all
Astronomical regulators and precision clocks
Chronometers, precision watches and timekeepers
Domestic clocks and watches
Other horological instruments
Apply Filter
Apply Filter
Type
Select…
Type
Type
Balance bridge
Beam model
Carrying case for H4 and K1
Case for H4
Chart
Component model
Component model; Sectional model
Counter poise
Design, Sectional model
Display label
documentary artifact: cover, first day
documentary artifact: print
Drawing
First day cover
Front bearing cap
Gridiron and glass vial
Historic label from H4
K2
Key
Main spring
Mainspring
MAP-SHEET
Marine timekeeper
Marine timekeeper 'K1'
Movement
Octant
One day marine timekeeper
one day marine timekeeper.
Pair case, dial and hands for H4
Parts
Parts temporarily removed from John Harrison's H4 for Ships, Clocks and Stars exhibition.
Parts temporarily removed from John Harrison's H4 for Ships, Clocks and Stars exhibition.
Photograph album
Pins
Print
Print depicting John Harrison
Prints
Rear bearing cap
Roll film negative
Sectional model
Spatula
Support column
surveying & navigational t&e: octant
Thumbnail catch
timekeeper: chronometer(K3)
timekeeper: chronometer, marine (H4)
timekeeper: main spring(piece)
timekeeper: timekeeper, marine(H1)
timekeeper: timekeeper, marine(H2)
timekeeper: timekeeper, marine(H3)
timekeeper: timekeeper, marine (H4)
timekeeper: timekeeper, marine(H4)
timekeeper: timekeeper, marine(K1)
timekeeper: timekeeper, marine(K2)
Transport case
Watch 'K2'
water transport: fighting vessel: 4 gun boat (HMS)
water transport: fighting vessel: 4th rate (HMS)
water transport component: midship: beam, iron (plan for connecting)
water transport component: model, design: sectional model(midship: side)
Winding key
Apply Filter
Materials
Select…
Materials
Materials
brass
bronze
Cellulose nitrate negative
chalk
copper
diamond
enamel
engraving, stipple
glass
graphite
ivory
ivory (CITES)
lignum vitae
mahogany
metal
metal: brass
metal: enamel
metal: steel
mezzotint
oak
paper
pastel
plastic?
ruby
silver
steel
stipple engraving
textile
varnish
watercolour
wood
wood: mahogany
Apply Filter
Display Location
Select…
Display Location
Display Location
Display - Atlantic Gallery
Display - Pacific Encounters Gallery
Display - ROG
Not on display
Apply Filter
Creator
Select…
Creator
Creator
Gould, Rupert Thomas
Green, John
Harrison, John
Holl, W
Holl, William
Hooper, Lieutenant Geoffroy William Winsmore
Hopgood, R. J.
Jefferys, Thomas
Kendall, Larcum
King, Thomas
MOD Chronometer Workshops
Russell, John
Tassaert, Philippe Joseph
Unknown
William S Orr & Co
Wyllie, William Lionel
Apply Filter
Places
Select…
Places
Places
Barrow-upon-Humber
England
Harwich
London
Suriname
Unknown
Apply Filter
Events
Select…
Events
Events
Captain James Cook's 2nd and 3rd voyages
Apply Filter
Vessels
Select…
Vessels
Vessels
Bounty (purchased 1787)
Curtiss H4 Tractor Bi-plane Flying Boat (1915)
Deptford (1732)
Myrmodon 1861
Apply Filter
Exhibition
Select…
Exhibition
Exhibition
Ships, Clocks & Stars: The Quest for Longitude
Time and Longitude
Apply Filter
People
Select…
People
People
Bligh, William
Gould, Rupert Thomas
Harrison, John
King George II
Royal Greenwich Observatory
Royal United Service Institution
Apply Filter
Century
Select…
Century
Century
18th
19th
20th
unknown
Apply Filter
Date Range
Select…
Date Range
Date From
Select...
1735
1737
1739
1753
1757
1759
1760
1761
1766
1768
1769
1771
1774
1800
1835
1861
1900
1915
1916
1940
1952
1984
Date To
Select...
1735
1739
1740
1753
1757
1759
1760
1761
1768
1769
1771
1774
1786
1835
1850
1861
1915
1918
1925
1940
1972
1984
Apply Filter
Show only:
With images
showing 50 objects results for '
h4
'
Sort by
Relevance
Object title/name
Object title/name (desc)
Finding reference
Finding reference (desc)
John Harrison (Print)
Mainspring
Five aircraft studies: a Bristol Fighter and four (in pencil) of flying boats (Drawing)
12th Submarine Flotilla 1916-1919 (Photograph album)
Winding key
Transport case
Display label
Chart of the Atlantic Ocean, with the British, French & Spanish settlements in North America and the West Indies. (Chart)
Key
Counter poise
HMS 'Myrmidon' (1867); Warship; Survey vessel (Component model; Sectional model)
K1 (Marine timekeeper)
Front bearing cap
Portrait of Nevil Maskelyne (1732 -1811) (Drawing)
Winding key
Rear bearing cap
10 prints relating to Harrison's 4th marine timekeeper (Prints)
H2 (Marine timekeeper)
K2 (Marine timekeeper)
H3 (Marine timekeeper)
H1 (Marine timekeeper)
Gridiron and glass vial
Support column
Octant
First
Prev
Page
1
Current page
2
Page
3
Next
Last
Loading filters
Royal Museums Greenwich
Close
Search
Want to search our collection? Search here.
Back To Top