Lot 80124 – Switzerland, Waadt – 1849 5c, one single glass support cliché

Switzerland, Waadt – 1849 5c, one single glass support cliché with image reversed and without the central cross that was printed separately, a working cliché that incorporates Sperati`s notes on the violet filter and Verichrome celluloid to be used, with observations about exposure times, temperature and duration, also Sperati write a caution for his further production “pas utilisé trop dos et firs(?) – gardés”; a characteristic Sperati working cliché that incorporates many aspects of his technique, unique.