Poster Mountain has partnered with AntikBar, the online poster gallery based in South West London (UK), so that Poster Mountain can more easily provide restoration and conservation to clients in the UK. AntikBar specializes in original vintage posters and graphic design. Their stock can be found at and covers a variety of subjects - travel, advertising, sports, cinema, war and propaganda - from around the world, mainly from the late 1800s to 1970s. AntikBar also offers collection advice, consultancy and search on demand services for collectors, individual clients, and interior designers.

AntikBar is a Member of The Association of Art & Antiques Dealers (LAPADA) and the International Vintage Poster Dealers' Association (IVPDA).