https://antikvariats.lv/1961-latvia-ussr-typographed-unwmk-p111-2-latvian-philatelic-society
New items : 1961, Latvia (USSR), Typographed, UnWmk, P11½, Latvian Philatelic Society
1961, Latvia (USSR), Typographed, UnWmk, P11½, Latvian Philatelic Society -
new itemslatviaussrtypographedunwmk