by
Greg Pickersgill
Swiss manufacturer Kyburz, who so far as I know was the only maker to identify their products, using a very small K over IX mark on the inside rear of the helmets. So can you check - it is definately very hard to find if it is there, being quite small and often lightly impressed into the metal.
I'm not able to check any of my /40s at the moment but I can say that of the 18s and /63s I have only those with the Kyburz mark show the uptilt. So this may well be a manucaturing variation. Or not. Consider this a general call for all to get a piece of flat board and put your M18/40/63s on it!
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