During the long production period of 21 years, Pentax released two special editions (SE) of K1000. The earlier edition (my SN 64039br) is more special with the brown color skin and is rare to find. The later SE (my copies' SN 74519bl and 81675bl) has the same black skin like the regular K1000. Both SE bodies have a split-image focus screen and the sign of 'SE' on their right front shoulders.
My SE K1000 cameras have a stick on their bottom plates, saying 'BODY ASSEMBLED IN HONG KONG'.