Jack Posted October 8, 2007 Share Posted October 8, 2007 A compact M1 history, M1 adopted in June 1941. Anti magnetic steel rim introduced December 1942. From 44 on it was optional for manufacturers to put seam at the rear. Many thanks Tim - but what is the point of a anti magnetic steel rim when the rest of the pot is steel :dunno: Quote Link to comment Share on other sites More sharing options...
whistlinwolf Posted October 8, 2007 Share Posted October 8, 2007 The helmet "pot" is actually manufactured from a non magnetic steel , it needs the stainless/ manganese rim around its base as a strengthener . Quote Link to comment Share on other sites More sharing options...
Enigma Posted October 9, 2007 Share Posted October 9, 2007 Quite a lot of the WW2 helmets have stresscracks in them. The rim stops it from opening at the rim and revealing a sharp edge. The manganese is "armor" steel and the anti magnetic is softer steel. Armor steel breaks rather than bend making a sharp unfolded edge vulnerable to cracking. So, a front seam is WW2, a rear seam could be late war or post war. A front seam is a "garanty" of WW2 vintage. Fixed bales are the early type, swivel bales came later. Roughly the swivel was used for market garden, no proof swivels were used on D-Day. Quote Link to comment Share on other sites More sharing options...
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