Never heard of Nervi?

Me neither, but here it is in all it’s glory:

Nervi is a former fishing village in North West Italy just 12 miles from Portofino. The pride of the town is the Passeggiata de Anita Garibaldi which is a 2km walkway along the cliffs to the 16th century Torre Grapallo (shown in the above photo).
I found this pen and ink drawing of Nervi’s pride and joy. It was extremely dirty as if it had been hiding in someone’s loft for a very long time. It is signed by Havat (?) and I would say it is quite old. Perhaps drawn whilst the artist was on holiday? It cost a lowly ¬£3.95.