No, you 'could' have a SS case w/ PVD and use a Ti case back to side step some of the allergy issue. Myself, I have a slight allergy to nickel. Only really becomes an issue if and when I sweat under it. Otherwise, Im okay. Now, I know that the higher in 'grade' one goes in stainless steel, (ie 316L, 4xx, etc.) the less nickel there is in the metal. of course, the engineer who toldme that could have been dead wrong. But, my suggestion is efinetely, Titanium. Lastly, the watch that I now wear whilst my self-induced screwed rep PAM 1950 is being fixed [i swapped the mov't from the Ti moel i have and when I attempted to re-install the now shiny gold hands, i pretty much butchered them! Ill get new ones and this time also get an actual 'hand putter on'er thingy' to install the new hands.] due to the crown not staying in whe trying to change the time [prolly the stem being too short & not staying in and not allowing for the time to be adjusted. one can wind it but one can not change the time], is my new Gen. 6498-driven, Swiss Army Ambassador and it's made of either 316L or 440 (i think that's the 3 but I can't remember) stanless and I have no probs with my skin breaking out. Hope to hear of some resolution!
JEFFE007