Stampdesc Switzerland, 50(c)-gray&scar-unissued

desc_issuer: Switzerland
desc_denom: 50(c)
desc_color: gray&scar
desc_unissued: 1

Used by 1 overprinted stamp:
Switzerland airmail 5/22/1938 75(c) gray&scar oc=blk on=50(c)-gray&scar-unissued

Description does not match any stamp types!