The Nikon F with the Photomic TN viewfinder is the first Nikon available with a center-weighted exposure metering system. Apart from this and an additional battery test lever the Photomic TN is the same as the Photomic T.

Manufactured from April 1967 to July 1968.

I purchased the pictured camera at a camera store in Phoenix, USA, in November 2003. According to the serial number it was built between November 1967 and January 1968.
The beautiful BC-7 flash I found recently at a camera exchange in Vevey, Switzerland.