Zorki-1 #366336 mystery

This Zorki-1 #366336 was sold on ebay 151918503389 for peanuts. Serial should be a late 1c but body is a 1b. First I thought here was an additional digit added to the serial by mistake, but now I have no idea. The top-plate on the left side shows the early version. The shoe has different color and is the later version. 3 screws on the back like on 1b. Under the base-plate 1b technic. The lens from 1953 match with the body serial.

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http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/322016_366336 top.JPG

http://www.ussrphoto.com/UserContent/322016_366336 top.JPG

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/322016_366336 back.JPG

http://www.ussrphoto.com/UserContent/322016_366336 back.JPG

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/322016_366336 base.JPG

http://www.ussrphoto.com/UserContent/322016_366336 base.JPG

http://www.ussrphoto.com/resize/resize_image.aspx?ImgWd=800&IptFl=/UserContent/322016_366336 front.JPG

http://www.ussrphoto.com/UserContent/322016_366336 front.JPG

The lens #530xxxx match the year of the body serial, but around #366336 you normally find lesnses with #538xxxx, so it might not be the original lens.

I made a mistake, the top-plate belongs to a 1c, it looks just like an early version from this angle.

Then this is not so mysterious. It might be a 1c top-plate on a 1b body.