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COSTA RICA - 1870 - 1883 'TIMBRE PROPORCIONAL' REVENUE STAMPS. An accumulation of never hinged mint blocks & complete sheets, includes 1870 (these no gum) 5c black (140, incl three sheets 40), 50c red (136, incl sheet) and 1p orange (140 incl 3 sheets), 1883 5c black (144, incl 3 sheets), 25c bright green (140, incl 3 sheets), 50c orange-red (242, incl 5 sheets), 1p orange (253, incl 5 sheets), 2p brown (135, incl 3 sheets), 2½p violet (140, incl 3 sheets), 5p olive-green (144, incl 3 sheets), 10p green (141) and 25o rose (144 incl 3 sheets). Fascinating (+/- 1,900 stamps)