Much better, Tina. Thanks!
Doing my best impersonation of ZhangCheng...

All 4 are China. The bottom right has a modest premium, but you will need to do the final ID. I think it is 2N114a.
Measure the height of the BLACK overprint and do the following to make final ID:
if 4mm high, then it is 2N114a.
if 5mm high, then check for watermark 261...
if no watermark, then 2N114.
if wmk261, then 2N121.

k