Cb92 late models were equipped with Tach and other gauges could be any number of early bikes as that shape was used on c70/50/90 and I think ct70 and its variants, but the speedo mileage could outrule many of those. S90 had top speed between 55 and 60 in stock trim tucked to tank if you were a light rider.
Cb175 had 20bhp and was able to see 70-75mph without a wind to your back, an advance and milestone achievement at the time.
David
PS the ca95 /cb95/cb92 late variants had the tach but, it required a different top end as the tach drive was off the left side top cover over the cam end...