Vintage platters were usually made originally to complement a set of dishes. The platter was an extra serving piece, like the serving bowls and gravy boats that made setting a pretty table an easy job.
That is if you like your dishes all matchy matchy. I generally don't. Enter vintage platters. Starting a collection of vintage platters lets you stray from the herd.
As often happens, a piece or pieces of a China set gets broken along the way. As it happens, I really like the stray platters that are left behind.