1973 Dutch GP

Purley, the Brave Driver
[Level 4/LIGHT/Warrior/Union/Effect/1700/600]
If a "Williamson, the Suffering Driver" you control would be destroyed by battle: It is not, also Special Summon this card (from your hand). You can only use this effect of "Purley, the Brave Driver" once per turn. While this card is in your Spell/Trap Zone, once per turn, this card cannot be destroyed by card effects. Once per turn, you can either: Target 1 "Williamson, the Suffering Driver" you control; equip this card to that target, OR: Unequip this card and Special Summon it in face-up Attack Position. The equipped monster cannot be destroyed by battle. (A monster can only be equipped with 1 Union monster at a time. If the equipped monster would be destroyed by battle, destroy this card instead.)

Williamson, the Suffering Driver
[Level 3/DARK/Warrior/Special Summon/Effect/1200/0]
Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand, in face-up Attack Position) by banishing 1 Level 4 or lower Union Monster from your Graveyard, and cannot be Special Summoned by other ways. When this card is targeted for an attack: Destroy this card. When this card is sent to the Graveyard by a card effect: You can add 1 Level 4 or lower Union monster from your Deck to your hand. You can only use this effect of "Williamson, the Suffering Driver" once per turn.