细节
PETAL KOGAKU CO., Japan
A 22mm. diameter round Petal camera with polished chrome metal body, direct vision finder, I and B shutter, front plate engraved Petal Patents, back plate engraved
A 22mm. diameter round Petal camera with polished chrome metal body, direct vision finder, I and B shutter, front plate engraved Petal Patents, back plate engraved
出版
Sugiyama et.al. (1985), The collectors guide to Japanese cameras, p. 286 no. 5110.