Helo Members!
Been a while, but here I am back again with some more queries and thanks to everyone for the contribution to the Laid Like paper of Washington 6c if you remember.
Here today I have a 1c Franklin Stamp, and noticed on this particular one a clear 5 lines on the base, whereas I had few others as well of the Franklin stamp with four lines only.
Left Stamp below


Detail photo of the baseline.

The bottom two photos are normal stamps without 5 lines. infact out of 10 stamps I have only one that has 5 lines on base.

Any suggestions?
Thanks.