GB KGV Downey Head - Overview And Discussion

I was at a local Stamp Fair on Sunday and picked up a few items. Must say I was not very impressed with the quality of some of the stuff on sale. However I did add one or two items to my mint QE2 Morocco Agencies and Tangier stamps. I also picked up these three items :
A couple of overprinted Downey Heads. Nothing of great importance but nice enough stamps given the quality of some on offer. (Scan distortion due to the mounts)



I always buy a bundle or two of "old" postcards to see what postmarks I can scavenge.
An unused National Postal Museum postcard caught my eye so I bought that too.



Hard to imagine that this topic and a great collecting theme is based on TWO stamps. 2 values... 3 dies ... 3 watermarks ... 3 overprints.

I am trying to cross-reference the SG and SC catalog numbers for the 1d issues. Using a table of die type vs. watermark was able to cross-reference most of the issues. However, there are three that I cannot cross-reference:

SG-332: Die 1B, simple crown (scarlet); no corresponding SC#
SG-336: Die 1B, simple cypher; no corresponding SC#

SC-156: Die I (original), wmk 30; no corresponding SG#




The SG information in the table I took from "1d. Downey Head - Major Types" figure on page 1 of this topic. The SC information is my best-read of the "Scott 2015 Classic Specialized Catalogue of Stamps & Covers"

I was not surprised to find that SC would be missing SG listings, but was surprised that (it appears) SG is missing a listing in SC.

Any help in figuring this out is appreciated.

A decent list of Downey Heads can be seen here...

https://www.gbstamps.co.uk/king_geo...advanced.asp

@scotzm

Thanks for the link. Looks like it will be very helpful.