1854 QV ½a Litho Die-I deep blue Stone A vertical pair with Expert Committee Certificate

1854 QV ½a Litho Die-I deep blue Stone A vertical pair with Expert Committee Certificate
1854 QV Queen Victoria ½a Litho Die-I deep blue Stone A vertical pair, Unused (no gum), large to full margins, strong color and impression, bottom stamp with horizontal crease, with Expert Committee Certificate BPA No. 90446. Fresh and very fine condition; Sg no: 4