Civil Defense Liner ID please

Hello all, I am brand new here and would really like some help if possible. These 2 Civil Defense "helmets" are currently up for auction and I was interested in getting them. To me they look like M1 helmet liners that were painted and had stickers put on them. Does anyone have any info on time period for these liners and possible value?? I don't have photos of the inside so I have no idea what the webbing looks like. Any and all comments are welcome.

With chinstraps like those, the liners are either WW2 or Korea era. They are repaints used by the OCD. These are probably from the 50's into the early 60's. The deep shell 'doughboy' type were used in the 40's. Value is between $10-25 each. I wouldn't go more than $50 for the pair.

Fins...

Thanks Fins, as of now, I have the high bid at $13 for the pair and have my max set at $40 so we will see what happens. I may raise my max a little.