The basic stamp is a PRC 1951 Scott Type A17
I'll have a look later.
La Vuelta race is 12 km before finish exciting !
Right that's over.
OK Nothing in Scott (100 on 300)
Best I can do, is STANLEY GIBBONS China- North China
Money order stamps (Scott = remittance)
SG Type NC77 P13 no Gum
Gibbons in their wisdom, do not offer opt colours.
4 in set
Yours NCP326 $100 on $10 olive green
Needs confirmation, Your opt does not match the few they offer