3 VFNH singles of the 24c & 25c light blue & slate Loading Ore & Sealing Fleet from the 1937 Long Coronation Issue showing two different shades & perfs.
The 24c is perf 13.8, the 25c grayish black stamp is perf 14.25, and the 25c bluish slate stamp is perf 13.8.
Unitrade values this at $36. The stamps offered here grade 78, 80 and 84 as follows:
