M52 Czech helmets ?

[Mosin Shooter UK]

Hi all new to the site I'm newly into Soviet /eastern block helmets I have 2 as far as I know there both Czech M52 an I right ? The second and third pictures of the same helmet 1st picture is the other .any idea why there's holes in the rear rim of the darker helmet ??

[RKKAFan]

Hi,
welcome to the forum! Your second dark helmet is a Czech Vz 53 fire brigade helmet. The holes in the rear rim are for the fixation of a leather neck guard. The other helmet without holes is a normal helmet for infantry.

Regards

Wadim

[Gunny Hartmann]

Yup a fire brigade lid!...