"the kind of hat Chaplin wore"
Charlie Chaplin in the 1910s
Public DomainCharlie Chaplin in the 1910s

Further discussion of Sabina’s black bowler hat, first introduced on page 28 (see Bookmark).

One of the most famous recurring images of a bowler is in many of the comedies of Charlie Chaplin (Charles Spencer Chaplin, 1889-1977), a British-born, world-famous Hollywood star in silent films and a handful of feature films after the advent of sound.

The reference to the slapstick and romantic comedy star gives Sabina's hat more of an anarchic and playful flavor.