Prime Meridian Baseball Cap
Our Prime Meridian Baseball Cap features our iconic 0º 00’ 00” Prime Meridian of the World design. The design is printed onto a charcoal grey cap with a golden yellow piping line representing the Meridian Line.
This cap will provide much-needed shade and protection from the summer sunshine or from an unexpected downpour. This is the perfect souvenir from the home of time.
In 1884 the Prime Meridian was defined by the position of the large 'Transit Circle' telescope in the Observatory’s Meridian Observatory. The transit circle was built by Sir George Biddell Airy, the 7th Astronomer Royal, in 1850. The cross-hairs in the eyepiece of the Transit Circle precisely defined Longitude 0° for the world. As the Earth’s crust is moving very slightly all the time the exact position of the Prime Meridian is now moving very slightly too, but the original reference for the prime meridian of the world remains the Airy Transit Circle in the Royal Observatory, even if the exact location of the line may move to either side of Airy’s meridian.
This Baseball cap is exclusive to Royal Museums Greenwich and is part of our Prime Meridian & GMT collection.
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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.
