CSN 42 3871-1976
Platinum-iridium PtIr25

Standard No.

CSN 42 3871-1976

Release Date

1976

Published By

CZ-CSN

Latest

CSN 42 3871-1976

CSN 42 3871-1976 history

• 1976 CSN 42 3871-1976 Platinum-iridium PtIr25
• 1961 CSN 42 3871-1961 Pt-lr 25