Vintage coin collection in leather case

I lost my vintage coin collection yesterday around 3pm near Exchange Street and Wharf Street in Portland's Old Port, Maine. It's tucked in a dark brown, worn leather binder about the size of a paperback, with a brass ship etched on the clasp. Inside are roughly 120 coins from the 1800s to the early 1900s, silver and copper tones mixed together. You’ll spot it by the faded label on the inside cover with my initials 'P.P.'—it really means a lot to me because the coins were handed down from my grandfather, and I’d really love to get it back.