The first edition was published by Jonathan Cape in 1978, with a cover design by Raymond Hawkey (1930–2010), who was a friend and fellow art school graduate of Deighton. In an obituary for Hawkey, Rob Mallows quotes Len Deighton about Hawkey’s dedicated approach:
For SS-GB, […] Ray produced a book of British stamps complete with Hitler’s head that stamp collectors cherish. He also had the photographer Adrian Flowers make a photo of Whitehall that could be exactly matched with a parade in Berlin to make a fake postcard of Hitler in London taking the salute of a march past.
Red and black is a recurrent theme. Unsurprisingly, several of the typographic choices are either decidedly British (Windsor!), or stereotypically (Nazi-)German, i.e. blackletter in general and schaftstiefelgrotesk in particular, see the Harper edition at the end of this post, as well as the title sequence for the current BBC series.