That's one of the famous "No name Contax" which used to be sold with a Zeiss-Opton Sonnar in 1963-1964. Those were "no name Kiev 4A" actually.
Here the accessory shoe has no serial number, so it can come from a Contax body. It also can be a blank Kiev part.
Otherwise, this is a Kiev 4A from the 1960 era with, here, a genuine prewar collapsible uncoated Sonnar. It's worth $25 for the body and $90 for the lens if all the lens elements are genuine Zeiss ones with a perfect, unscratched front element.
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