I cannot find the following stamps in Scotts catalogues! Are these real stamps or cinderellas?

The Scott 2009 catalogue I have lists
Sahara Occidental (Espanol) but they stopped issuing stamps in 1975 when the country was divided between Morocco and Mauritania. Neither of these countries have any issues listed with Sahara Occ. since they took control.
As these stamps have 1991 and 1992 printed on them, then they were printed after the separation. Are they cinderellas or is there an independent state that is not recognised by Scott?