The hallmark is one used since 1935, the year the Normandy was launched.

I always eat with only the same one knife, no other utensils.
it's a Christofle Hotel butter knife
Christofle has outfitted the first French transatlantic ships and the great luxury ocean liners. They produced the 45k pieces needed for the running of the Normandy in art deco style. Grand Hotels of Joseph Cornell! Designed in part by Christian Fjerdingstad

I don't wash my knife, I only wipe it with the residue from each meal like blood from a sword, to a high polish.

the next hallmark of 1983