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|Advertisement in Shashin Salon January 1934. (Image rights)|
Tōyō-sha (東洋社) was a Japanese company which made filters, filter holders and hoods in the mid-1930s.
- ↑ Advertisement in Shashin Salon January 1934.
- Shashin Salon. Advertisement by Tōyō-sha in January 1934. No page number.