OK just been up into the loft and took some photos, this is the original seat off my 1976 Honda CB750F1, I bought it new on the 12th April 1976, The original tank leaked so I bought a new CB750F2 tank and seat from a fledgling David Silver spares company from an ad in MCN.
The original tank and seat where kept in storage.
Here are the photos, the seat has not been molested at all and does have Honda written on the back of it.

[imghttps://imagizer.imageshack.com/img921/9706/WzV5rh.jpg]http://[/img]



Cheers
Dennis