There's a recent (March 9) post over on the blog Austen Only that discusses the Austen coat of arms, crest, and motto. Included with the post are images of a wax impression of the crest, a bookplate of Jane Austen's father George with the crest on it, three pictures (including a detail shot) showing an intaglio seal of the arms, crest and motto, as well as a color photo of the Austen arms from a memorial to James Austen's first wife Anne in the Steventon parish church.
It's a nice little article, by someone (J.F. Wakefield) who is not only knowledgeable about the Austen's but also has a good grasp of heraldry and heraldic usage. Whether your interest is about Jane Austen and her family, or only in heraldry, I can recommend this article to you. It can be found on-line at: http://austenonly.com/2012/03/09/the-austen-coat-of-arms-and-seal/