Harrison's 4th Marine Timekeeper Drawing
Plate X, figures 14 & 15 relating to Harrison's 4th marine timekeeper taken from 'The Principles of Mr Harrison's Timekeeper' (1767). Print reads: 'Let the diameter of the upper plate be 1/16 Inch more'. John Harrison's H4 is the most important timekeeper ever made. It also helped solve the Longitude puzzle which helped save countless lives at sea.
Artist: Unknown
Date: 1767
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Frequently asked questions
Our standard processing and fulfillment time is 1-2 working days from the time you placed your order, excluding Custom Prints, online-only telescopes and personalised clothing.
All UK orders (excluding personalised clothing) are sent using a tracked service.
Custom Prints (those which are customised by choosing a size and frame) and personalised clothing take a little longer to fulfill due to being made to order.
Please see our Delivery and returns page for more information and last order dates.
Online-only telescopes are shipped directly from Celestron.
FREE Standard UK delivery for all orders over £50 (Royal Mail)
For all other orders, we offer Standard UK delivery for £4.95 per order (Royal Mail).
Delivery rate varies by country and value of order, and starts from as little as £6.95.
Please allow 5-7 working days for standard orders to be dispatched.
Custom Prints (those which are customised by choosing a size and frame) and personalised clothing take a little longer to fulfill due to being made to order. Please see our recommended last order dates for these items on our Delivery and returns page.
We send using a Royal Mail/FedEx tracked delivery service (excluding personalised products). Please allow 7-10 working days to receive after we have dispatched.
Please see our Delivery and returns page for all information.
For all returns, please contact us as soon as possible using the contact form, expressing your wish to return. Please wait for confirmation from one of our team before returning.
Custom Prints (those which are customised by choosing a size and frame) and personalised clothing are made to order and therefore we are unable to offer a refund or exchange, unless they are faulty.
Please see our Delivery and returns page for full information.
