List of longest official serving bosses for the second largest city at the time...
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1. Ricca (around 36 years)

2. Accardo (between 21 and 29 years)

3. DiFronzo (around 20 years)

4. Aiuppa (around 10 or 12 years)

5. Giancana (6 or 7 years)

I think Solly D also belongs to this list but Im still not sure regarding his tenure as official boss.

He who can never endure the bad will never see the good