Victorian Betjemann's Patent Coromandel & Porcelain Book Slide, c.1860.A stunning Victorian Betjemann's Patent cut gilt brass, coromandel and porcelain book slide, c. 1860. The hinged ends are each inset with three Svres style porcelain plaques, each depicting a different scene; the book slide depicts six separate scenes in total. All six porcelain plaques remain in an excellent condition. The slide has a gilt brass plaque to each end, one reading 'Betjemann's Patent 5481', the other 'Self Closing Book Slide 5481'. The