Lobster tailed helmet circa 1640

[Victrix]

Originally Posted by fernando

Yes, probably some code letter to deal with production inside the arsenal or workshop, assembly lot or the like, but not an actual origin mark to be recognized on the "market".
BTW, isn't that a letter (M?) in the nasal of the impecable example you are posting ?

Either that or a W, depending on the point of view. Thinking about it, I have seen these letters mostly on the simpler munitions grade Zischäggen. Some of the higher quality decorated ones have maker’s or guild marks but nasal bars are not marked with these letters. Maybe some armourers specialized in nasal bar production and this relatively simple item could have been outsourced in mass production supply chains.