Nikon BC-7 Instructions Manual page 5

Testing system
Checks the synchronization circuit, connection of the flash bulb and
charging circuit.
Connection to the camera
Direct, cordless connection to the flash terminal on the camera ac·
cessory shoe.
Synchronization cord socket
P .C. type socket is provided for connecting the cord fClr extension
flash .
Weight
Approx. 180 g (without la minated battery)
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