I've been working on my Irish bird series and came across two entries that are virtually identical in my 2009 Hibernian catalog. I'm either missing something (likely) or there is an error in the catalog. Could someone with a 2014 catalog take a look at the following entries to see what their descriptions are?
The description for Hibernian Catalog numbers D261 – D271 reads:
"Booklet stamps self-adhesive. Printed in Litho by SNP on chalk paper with phosphor frame. Perf 11 x 11 ½"
The description for catalog numbers D272 – D279 reads:
"Self-adhesive coil issues. Printed by SNP in lithography on chalk paper with phosphor frame, surplus rounding paper removed. Perf 11 x 11 ½ "
The obvious answer would be that the coils (D272 – D279) are imperforate on two opposing sides. These stamps are perforated on all four sides but are issued in a coil format. (Se-tenant pairs are given a separate number, e.g. D272a).
Here are two stamps that are unique in the series, 65c Song Thrush (D269 ) perf 11x 11 ½ and the 38c Goldcrest (D273) perf 11 x 11 ½ . The Song Thrush is listed as a booklet stamp, and the Goldcrest is listed as a coil issue. Both have the phosphor frame.

The scan is a little deceptive. Both stamps have the identical dimensions as well.
What the devil am I missing?
Any help would be appreciated.
Thanks in advance,
Dan
