Need Help With Chinese Stamps

I am just starting to sort through my fathers stamps, and I know I am going to be here with lots of questions.

First I thought I'd start with 3 groups of Chinese stamps:





These were in glassine envelopes and were numbered (427-437 and 591-595 and 11-23).

Can anyone help with identifying these. And please let me know if I need to poet different kinds of pictures or provide different information, because this is my first post and I am going to be back a lot more.

Thanks.

You'll get better results if you limit each image to 12 or 16 stamps, arranged 4x3 or 4x4. And a scanner, if you have one, is far superior to most cameras.

Thanks for the suggestion. Will redo the photos in the morning.