![BOLIVIA - 1924 - REVENUE & PROOF: 5c dull blue 'Revenue' issue WATERLOW COLOUR TRIAL in unissued colour, doubly perforated on three sides with large sheet margin at right and 'WATERLOW & SONS LTD SPECIMEN' overprint in black. Fine & Scarce. (Hilchey & Akerman #AA17sb) (BOL/12125)](http://latinamericanphilatelics.com/cdn/shop/products/BOL12125_{width}x.jpg?v=1645796779)
5c dull blue 'Revenue' issue WATERLOW COLOUR TRIAL in unissued colour, doubly perforated on three sides with large sheet margin at right and 'WATERLOW & SONS LTD SPECIMEN' overprint in black. Fine & Scarce. (Hilchey & Akerman #AA17sb)
5c dull blue 'Revenue' issue WATERLOW COLOUR TRIAL in unissued colour, doubly perforated on three sides with large sheet margin at right and 'WATERLOW & SONS LTD SPECIMEN' overprint in black. Fine & Scarce. (Hilchey & Akerman #AA17sb)