Reach & Spalding Guide Release dates
 

Is there any widely accepted release dates of these 2 guides ? For example, I notice that some team pics have different players on them from the same year each was released. I was wondering if maybe Reach and Spalding were released at beginning and ends of each year, thus creating the different team pics we see for certain teams. Has anyone studied the release dates of these 2 guides ? Also, were they consistent year to year ?? Thanks for any info - (In particular 1900-1914)

JJ