Message Decoder box alternate builds. I quite like the 3rd.
Tag: Space Police
6831: Message Decoder
6831-1: Message Decoder, 1989. Small rover with ample firepower. Smallest Space Police set.
Jail Cell
This jail cell with laser bars and Blacktron prisoner appeared in all the larger Space Police sets. It docked to vehicles in a horizontal position via the 2 bars on the back.
Black-suited Space Minifigs
Evolution of black-suited space minifigures (left-to-right): Classic Space, Futuron, Space Police
SP-Striker lights
Blinky lights
6781: SP-Striker
6781-1: SP-Striker, 1989. Mid-sized Space Police ship with electric lighting. Inner core slides out to form a smaller ship. Detachable jail cell with Blacktron prisoner.