Shell Wrecker Auction Link- https://ebay.us/lu8b4X
No. 3918 Wrecker was made in 1984-1985 and did not have brown gears. This one has a brown drive gear and white worm gear so the drive gear is a replacement, likely for a cracked gear, which is very common. The wiring and light bulb are not original.
The bulb is the wrong bulb, however the correct one can be purchased here or message me to buy one directly- https://ebay.us/1mgOLq
The back tires do not match, but can be replaced with modern ones here- https://ebay.us/h7VLln
With that said, anything this old can have some restorations to get it to working order, however, they used the wrong bulb and wires. Take this into consideration if bidding.