Why do penny loafers have a slot for a coin?

Why do penny loafers have a slot for a coin? penny loafers penny slot The Penny Loafer Created in the 1930's, one of the first loafers, the Weejun loafer was made by American shoemaker Bass The traditional slip-on leather penny slot machines online Men's Berkley Flex Moc Toe Penny Loafer

penny slot machines online light brown suede almond toe penny slot slip-on style flat rubber sole This piece comes complete with a protective dust bag

penny slot machines free slots I have sharp vision, so I always pick up pennies on the road It's a lucky sign in my culture, and I usually put it on my penny loafer  A slip-on style, they're accented with a classic penny slot detail sitting atop a low stacked heel Made in Italy Highlights black; calf leather; penny slot