Here are alternate images of Speece. 1926 with Cleveland and 1924 with Washington.
In terms of the Roy Spencer images here are the dates of the images requested which may assist in the process. The very nice Washington image is from 1932. The significantly clearer Cleveland image is from 1933 and the Brooklyn image from 1937.
1937 is a highly significant year in Dodger history as it was the year the Brooklyn team played in Dodger green. I attach an actual color image I posted back in 2007 of Woody English from 1937. I think it would be fun,if you welcome the challenge, to colorize some other Brooklyn images from 1937 sporting their Kelly Green.
Some more info can be found if you follow this link
http://www.sportingnews.com/mlb/news...a1sosmmeju3p11