The orange is from the Chinese Martyr series of 1932-34 SC#322 The green Chinese Dr. Sun Yat Sen is SC#299 1933, Type II. The Blue is Japanese, though I can't pinpoint the exact issue, no catalogue. However I have an identical stamp same denomination in a violet brown colour, from 1930-37. Sorry I don't have more on that.
Hi Bob The blue is Japanese, the 1922 issue showing Mt Fuji and Sika deer. Cat number SG305, 20s blue. My old SG catalogue gives it at 55p used, that is for the basic stamp. It has probably gone up a tad in value since 1988!
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