This is a Seiki-Kogaku Tokyo (currently Canon) camera, the Canon SII model. Manufactured between October 1946 and June 1949. It bears the inscription SEIKI-KOGAKU TOKYO.Additionally, in September 1947, the company changed its name to Canon Camera Co., Ltd., so there are also SII models with the engraving CANON CAMERA COMPANY LTD. Approximately 7,500 units were produced in total. The lens is the Serenar 5cm f3.5, released in 1946 for the post-war version of SII model. Tessar-type with 4 elements in 3 groups. Feet scale. Signs of wear, plating loss, and deterioration of the plating are visible on the top cover's rear portion, corners, and bottom plate due to usage. However, there are no major impacts. Considering the manufacturing quality of this era, some degradation is unavoidable, so this camera remains in relatively good condition. Fully sericed in March 2024. All the functions are in good working condition . The lens has slight deterialation and very slight cleaning marks on the inner element, yet sill in clean as this lens. Please note the following 2 points. 1. Except when using the slow speeds (1/20 to 1 second), always lock the shutter dial in the 20 position. Using it in intermediate positions may cause malfunctions. 2. When rewinding, please keep the shutter button pressed continuously.