I found this on ebay. It is the same as my first bike except mine was in red, a much nicer colour. God it was quick in it's day especially as I was just turned 17 and had just passed my test on my Dad's BSA Bantam 175. I think I paid around £300 for mine and I remember that my insurance in 1973 was £33 and a few pence for third party fire and theft. It and I were on fire every time I rode it.
I remember it's engine being better than it's brakes..
https://www.ebay.co.uk/itm/134267696012?mk
