Vintage M. J. Hummel Carefree Days Blank Note Cards #2983 12 Cards 10 Envelopes. Carefree Days Authentic Hummel Notes distributed exclusively by Crestwick-Hummelwerk. Set includes 12 blank cards and 10 envelopes. Set includes some duplicate cards. See photos for details. Original box is included. Cards and envelopes show some discoloration due to age.