This small metal view camera, in Daimeishi format (6.5 x 9 cm), belongs to the family of cameras with focusing using an Archimedean screw, a process that seems to have been rarely used outside of Japan. Examples of such cameras include the Ohca cameras by Konica, Sirius/Lomax by Minolta, First Hand and Kokka by Kuribayashi (Petri), the Weha Light B or Need by unknown manufacturers, and the smaller format Nifcarette A by Minolta. It has fewer than two handles!

The model is simple, without any movement of the front standard, but the optical/shutter equipment is rather capable: the Compur shutter is among the best available at the time, and an aperture of f/4.5 was considered bright back then.

One advantage of the Archimedean screw, in addition to its precise adjustment, is its natural stability: the elasticity of the bellows cannot affect the focusing mechanism and thus doesn't require a locking system for the carriage.

When opening the front by the timeless button beneath the leatherette, below the handle, springs push the front panel forward. The characteristic curved scissors, often seen in Yamamoto's production, lock into tiny notches on each side. With small fingers, one can then grip the optical block by the two posts to extend the bellows until a stop is engaged. The focus is set at infinity. The Archimedean screw allows a 4 cm forward movement of the carriage for close focusing.

The model name is embossed on a blackened brass plate set in the center of the inner side of the front panel. There is no mention of Yamamoto anywhere, but numerous period advertisements leave no doubt.

To conclude, this unique camera follows the rule: there are two tripod sockets present, one in the center on the bottom and one in the center on the right side!

When it was discovered, it was stored in a wide case marked Tokyo, lined with red velvet, and also containing three film holders, a Film Pack adapter, and some filters.