Non-magnetic palladium alloys, invented by Paillard, of
Switzerland, used in anti-magnetic watches. The following are given as
the compositions of several such alloys:

I.                II.
Palladium,  60 to 75   parts   50 to 75  parts
Copper,     I5 to 25   “       20 to 30   “
Iron.        1 to 5    “       5 to 20   “

The following are more complex:
I.                II.
Palladium,   65 to 75   parts   45 to 50   parts
Copper,      15 to 25     “     15 to 25   “
Nickel,       1 to 5      “      2 to 5    “
Silver,       3 to 10     “     20 to 25   “
Gold,         1 to 2-1/2  “      2 to 5    “
Platinum,   1/2 to 2      “      2 to 5    “
Steel,        1 to 5      “      2 to 5    “

These alloys are used for balance springs, as well as for the balance
wheels and escapement parts of watches. The elasticity of recently
produced springs has been found to be very satisfactory.