The yellow 24636 is one of the most collectable of any of the pikemaster cars. It differs from the 24631 in that is has no red stripe, red handrails, or "radio equipped" markings. It also does not have a chimney. Made in 1966 only the yellow 24636 has a current value in excellent condition of $600! The caboose in the picture was in an eBay auction of a Pioneer 600 train set.