Requesting ID Help For Asian Stamps

I suspect these are all from then same country but, not sure.

Korea. The top flag waving ones are from 1946.

These are US BOB ?

Rogdcam is correct they are from Korea.. They are not US bob. Not sure if all are postal or some are revenue.

The first six are the set of definitives of 1 May 1946

The corner copy is a commemorative: opening of airmail service to US of 9 Sep 1946

Bottom has three more definitives issued Sept./Oct. 1946

No fiscals here.

After awhile, you will recognize either the alphabetic lettering -- this is clearly Korean writing -- or the common symbols used on many stamps. Japan often includes a chrysanthemum plus the writing is clearly Japanese. In addition to its own very different writing system, Korea often used (uses?) the Ying-Yang symbol which looks like two tadpoles eating each other.

You can check the catalogues for these identifiers. Many modern stamps also include the country name in our alphabet, Roman letters, which helps -- but not all of them do.