I have the book "Helmets of the ETO" and the way it reads, it says swivel bales came around in november 1943 but stainless steel swivel bales didnt start until the beginning of 1945. but the rims changed to the same steel as the shell in october 1944 as front seam and in november was changed to the rear seam. so surplus stainless steel rims would have been made rear seam after november 1944 and putting this all together you should not have a front seam stainless steel rim helmet with stainless steel swivel bales. however i do. and ive been into M-1 helmets for a long time and i understand that the dating scale in the book is for McCord helmets only. so are all the transition dates based on McCord helmets as well? its the only conclusion i can come to seeing as my helmet is a Schlueter # 264A with the S under it.
so if anyone can figure out what i am saying itd be very helpful to sort this out for me