Found this key chain on my recent travels!
Left Chinese 9mm revolver
Right Chinese 9x19mm for comparison
Dimesions of the revolver cartridge are
Case length 0.666"
Mouth diameter 0.378"
Base diameter 0.388"
Rim diameter 0.433"
Rim thickness 0.055"
Overall length 1.037" (caution - this was not taken from a loaded cartridge)
Headstamp on both examples is 11 07
Bullet jacket is gilding metal, case is brass.
I’m now kicking myself for missing the opportunity to try out the revolver!