I removed this stamp from an Album dated 1879,(see here http://goscf.com/t/26993)
sadly it's not in great shape. I do not see a grill on it could it be a 114a?
I have many stamps in this 1879 album and I am taking great care to remove the stamps. But I think many of them have faults.
I have a 116 with a nice cancel but it's torn in the center.