Finnish M40/55 contract helmets, one is the last M40 clone produced with 3 holes for split pins to mount a liner, after that the M53 was developed. Other shell is M40/55 helmet
Amazon.com: Original German M40 WWII Type Steel Helmet- Finnish M40/55, Size 57cm, US 7 1/8 : Automotive
Original German M40 WWII Type Steel Helmet- Finnish M40/55 Contract - – International Military Antiques