Cut Square ID Help Please

Let me preface this, I don't collect cut squares but a few came in a lot I acquired. I haven't delved much into the back of the book yet. I'm curious which ones these are to see if they have any value. This first one is an embossed oval with no value indicated 31mm x 27mm the second two Looking around online I see a few similar looking pieces number around U270+
Any help would be much appreciated.

The blue on white "Postal Service" is Scott UO17 valued at U$10.50 f/vf in my 2013 Scott Specialized. The clipped corners may look "niffity" but they severely reduce the value.

The bottom left is probably U277 valued at U$0.25 (probably off white paper but hard to be certain from a scan).

The bottom right is U265 with a Scott catalog value of U$6.50 for f/vf. The torn off corner UL reduces the value.

Thank you for the id help. Too bad about the condition.
Best,
Greg