![PANAMA - 1887 - PROOF: 1c black on blue surface glazed paper 'Map' issue PROOF in unissued colour. Ungummed. (As SG 5) (PAN/38668)](http://latinamericanphilatelics.com/cdn/shop/products/PAN38668_{width}x.jpg?v=1650979786)
1c black on dark blue 'Map' issue TRIAL PRINTING on surface glazed paper in unissued colour. Ungummed. (As SG 5, Heydon #8g)
1c black on dark blue 'Map' issue TRIAL PRINTING on surface glazed paper in unissued colour. Ungummed. (As SG 5, Heydon #8g)