1908 Used 1cent Benjamin Franklin Perforated On 3 Sides

I'm wondering if these are normal. Specifically the one with no perforations on the bottom. Also, if you can tell me if they are all the same stamp and what #. Thank You.

Welcome.
Yes, they are normal. Stamps like these were printed in sheets with the stamps around the edge of the sheet having 'straight edges'. And these stamps were also issued in booklets in which case the stamps could have one or two 'straight edges'. US straight edge stamps are sometimes identified as 'rare' stamps, you can learn more here on 'straight edged' US stamps here
https://stampsmarter.org/learning/I...reLines.html

You stamp is part of the 1902 series; over 11 billion of these 1 Cent green stamps were issued. You can learn more here
https://stampsmarter.org/1847usa/19...ntifier.html
Don

Thank you Don. I sell on ebay and I cant trust the stamps, coins, marbles that have been sold as far as research. I do know there are some buyers that have been ripped off. You see the exact same picture in the sold items over and over.
I really appreciate your help.
Dana