J30s - Three pence 'specimen' of 1867
Plate 5 Pane showing current number above stamp AB
Image source British Postal Museum from the R M Phillips Collection. Vol XXXII pg 28. This is not from the top-left of the plate, but from the top-left of one of 12 panes (this being a bottom pane). This demonstrates that there were selvage markings in between panes. See diagram below.
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