22 fine/very fine used singles of the 13c deep blue Halifax Harbor from the 1938 Pictorial Issue, dated copies, unsorted as to paper types.
Included are 1938 x1, 1939 x4, 1940 x1, 1941 x6, 1942 x4 and 1943 x4. You can add dates to the rows in my table, see what you can make of them.
Unitrade doesn't list these varieties, so we estimate them at $6. The stamps offered here grade between 66 and 75 as follows:
Centering/Margins: 30/60, 35/60
Paper Freshness: 5/5
Colour: 5/5
Impression: 5/5
Absence of Visible Paper Flaws: 5/5
Perforations: 10/10
Cancellation: 6/10, 8/10, 10/10
