Project KGB: The Secret Formula Board Game Vintage Spy 1973

The game appears complete but the rules and box don’t say what should be in it. Contents: 4 player movers 1 guard mover 30 blank plastic blank envelopes 1 plastic envelope with the secret formula 2 dice Instructions in English and French Contents are in very good condition but the rules have a few stains and are yellowed from age. Box has some wear but it’s over 50 years old! Please see photos. For ages 8 to adult. Don't look now, but you're being watched! They know you've found Project KGB, the secret undercover spy training camp! In KGB, you're either an agent trying to identify the double agent, or you're the latter, sabotaging the training camp. Deception and deduction will keep you scrambling!