Lot of 3 different Burlington Northern Envelope styles. 19 brown envelopes with return address for The Burlington Building in Chicago IL and meant to send out R. R. B FORM 5010. 16 of the Medium White Envelopes with the signature Burlington Northern Marking. 1 of the standard letter envelopes which does have some black paint spots and some wear on the back side of it. Finally, two small flip notepads 1976 and 1977 calendars. Note pads are not written in