Vintage Royal Doulton WHITE'AULD MAC' Large Toby Mug Character 6 D5824

Vintage Royal Doulton WHITE'AULD MAC' Large Toby Mug Character 6 D5824. There is a small crack on top, see pictures - i don't know if this is true, but i was told the unpainted ones are rejects and perhaps the crack is why. This is from my dad's collection; he loved the unpainted rejects.