1940-51 Green Bay Packers

1940: Packers were a mix of solid navy socks and no socks at all.
1941: Packers wore no socks all season until 12/14/41 game in Chicago.
1942-43: Packers wore no socks for both seasons.

1940-51 navy is very dark.
1941-51 yellow pants are actually gold/khaki in color.

10/10/43 - DET @ GB (screenshot of NFL Films footage)

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1938-48 Detroit Lions

Color film of 9/24/39 Lions shows that the 1938-48 blue was a deep royal and the silver was brighter than predicted.

https://99wfmk.com/2019-marks-the-detroit-lions-90th-anniversary/

9/24/39 - BRK @ DET

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1941 Philadelphia Eagles

Eagles' black pants had a navy blue band around the tops in place of a belt system.

10/19/41 - WASH @ PHIL

10/12/41 - PHIL@ NYG

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1941 New York Giants

Wore blue for Week 2 @ Philadelphia.

9/13/41 NYG @ PHIL

1939-44 Washington Redskins

Front/back numbers larger, back numbers higher on shoulders.

12/13/42 - CHB @ WASH

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1941-42 Philadelphia Eagles

Front/back numbers made taller

10/19/41 - WASH @ PHIL

NEW

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1940-46 New York Giants

Improved size/position of front/back numbers.

9/28/40 - NYG @ PHIL

10/27/46 - CHB @ NYG

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1940-42 Pittsburgh Steelers

1940

Block numbers sized/positioned the same as 1939 numbers.

Added yellow-topped sannies.

1941

Made yellow jersey's numbers same as 1940.

Increased the sized of front back numbers to match what I saw in 1940 Eagles photos (green jerseys).

Green jersey numbers are pro-block but font is slightly bolder.

1942

Front/back numbers on yellow jerseys made identical size/position to 1941 yellow jerseys.

Front/back numbers on black jerseys almost identical in size. 

Back numbers higher on back than normal on black jerseys.

11/3/40 - PITT @ WASH

9/21/41 - PHIL @ PITT

11/8/42 - PITT @ DET

12/6/42 - PITT@ GB

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1940-43, 1945-49 Chicago Cardinals & 1944 Card-Pitts

Improved size/position/font of front/back numbers

Thickened 1948 pants stripes to match 1949

10/27/40 - CLE @ CHC

10/19/41 - CHC @ BRK

11/4/45 - CHC @ WASH

10/6/46 - CHB @ CHC

10/12/47 - CHC @ GB

12/5/48 - GB @ CHC

10/2/49 - CHB @ CHC

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1941-49 Green Bay Packers

Slight 2-toning for all years.

2-tone is front/back only for 1943-49.

1941-42 has darker 2-toning in elongated fly-area, also.

10/12/41 - BRK @ GB

12/6/42 - PITT @ GB

10/2/49 - LA @ GB

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1940-49 New York Giants

2-tone pants - both grey and khaki

1945 plain helmets changes to same model as normal blue/red helmets.

1945-49 belts matched pants.

Tuffy Leemans & Cuff Ward - 1941

11/3/40 - NYG @ BRK

10/21/45 - PITT@NYG

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