You can now buy your very own Tube Roundel sign from the London Transport Museum Shop.
From their website:
The London Underground logo or ’roundel’ is one of the most recognised British icons and is seen just about everywhere in London.
There are a number of different types and styles of signage that are used in and around Underground stations including vitreous enamel signs and roundel silhouettes.
For the first time ever, you can buy 100% authentic, vitreous enamel Underground signs. These signs are made to order by AJ Wells (the same manufacturer that makes the signage for Transport for London) to the exact specification as seen at stations in London.
Very cool! They’re a little pricey at £795.00 (about $1300) but I reckon one of these would look quite nice in Londontopia headquarters!