I just hate it when I am not paying attention. I need to spend more time on this stuff .
Thanks for the info Patrick. I know there have been discussions in here in the past on what constitutes a Master 52 set ( which I am not pursuing), but I also know ( I was paying attention some of the time), that the list has been expanding ( often to include recurring print defects). What do you, or others, think now constitutes a complete 52 Master Set
And is the House yellow/gray a true variation resulting from an intentional change in the printing process, such as red and black or cream and gray backs, or just an accidental ( maybe one time) print defect ? I realize that examples of both kinds can be found in catalogs and in the registry master lists