cover 1896 envelope (opened out for display) registered to France bearing fourth printing 1n. grey (5, with a strip of four on reverse), 2n. yellow (2, one on reverse), 3n. green (3, one on reverse), all tied by "CETINJE" c.d.s. and with red registration label adjacent, underpaid by 2n. for the 20n. rate, though no postage due was apparently charged. Very colourful. Photo