Porthole Range of Clocks and Barometers
The Porthole Range of Clocks and Barometers is made of solid, unlacquered brass with an opening bezel and bevelled glass.
Tide clocks feature an additional hand which records lunar time over a 24 hours 50 minutes period and so indicates successive high and low tides. The Porthole Range comes in three sizes.
Dimensions
- Back Flange Diameter S=145 mm, M=186 mm, L=220 mm
- Face and Dial Diameter S=80 mm, M=115 mm, L=143 mm
The Porthole Range of Brass Clocks and Barometers is made of solid, unlacquered brass with an opening bezel and bevelled glass.
The barometer features a sealed unit with adjustment mechanism. The Porthole Range comes in three sizes and is available as a clock, barometer or tide clock.
The Porthole Range of Brass clocks and barometers is made of solid, unlacquered brass with an opening bezel and bevelled glass. Tide clocks feature an additional hand which records lunar time over a 24 hours 50 minutes period and so indicates successive high and low tides. The Porthole Range comes in three sizes and is available as a clock, barometer or tide clock.
18070 Small Porthole Clock (back 145 mm, face 80 mm)
18071 Medium Porthole Clock (back 186 mm, face 115 mm)
18072 Large Porthole Clock (back 220 mm, face 143 mm)
The tide indicator hand should be set to high tide when the next high tide in your location occurs. The exact time of the next high tide can be obtained from official tide tables.
As a general rule the best time for setting the tide hand is at high tide during a new or full moon. If it cannot be set during a new or full moon then we recommend checking it at that time during the next cycle.
The tide clock is not a perfect predictor of high and low tides during a moon phase however at the same location and at the same moon phase it is surprisingly accurate.
