This Malaysia made model has a black base and tracks, gray plastic boom and shovel and small hidden wheels.
a. white, blue stripe w/“BX-1” on sides First Editions, #512 $20 – 30
b. yellow, yellow shovel and boom, red, black and white stripe design w/CAT logo on sides. Caterpillar Action Machines w/vial of “Clean dirt” (1998) 4 – 10