Escondido California Telescope Observatory Palomar Mountain 150 cartolina lino
Linen Era (1930-1945). When World War I ended at the end of 1918, the rate was lowered to its pre-War level of one cent. 2018 (January 21) 35 cents. 2016 (April 10) 34 cents. 2015 (May 31) 35 cents. 2014 (January 26) 34 cents.