* Add 1 Part 3183a Blue Plate, Modified 1 x 4 with Tow Ball Socket, Long, 2 Slots (8mm Socket Length) (Alternate) (match ID 1)
* Change 1 Part Blue 3183b Plate, Modified 1 x 4 with Tow Ball Socket, Long, 4 Slots (8mm Socket Length) {match ID 0 to 1}
Comments from Submitter:
When I got this set, back in the seventies. this was the first one (of which I can remember) to have a 2-slot tow ball socket. This set was never mixed up with other sets.
Netherlands, Noord-Brabant
